20404779520

素因数分解:

$2^9\times 5^1\times {\mathrm{53}}^1\times {\mathrm{101}}^1\times {\mathrm{1489}}^1$

素因数の和:1666

約数の個数: 160

約数和(自身を含む): 50374074960

約数和(自身を除く): 29969295440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 53, 64, 80, 101, 106, 128, 160, 202, 212, 256, 265, 320, 404, 424, 505, 512, 530, 640, 808, 848, 1010, 1060, 1280, 1489, 1616, 1696, 2020, 2120, 2560, 2978, 3232, 3392, 4040, 4240, 5353, 5956, 6464, 6784, 7445, 8080, 8480, 10706, 11912, 12928, 13568, 14890, 16160, 16960, 21412, 23824, 25856, 26765, 27136, 29780, 32320, 33920, 42824, 47648, 51712, 53530, 59560, 64640, 67840, 78917, 85648, 95296, 107060, 119120, 129280, 135680, 150389, 157834, 171296, 190592, 214120, 238240, 258560, 300778, 315668, 342592, 381184, 394585, 428240, 476480, 601556, 631336, 685184, 751945, 762368, 789170, 856480, 952960, 1203112, 1262672, 1370368, 1503890, 1578340, 1712960, 1905920, 2406224, 2525344, 2740736, 3007780, 3156680, 3425920, 3811840, 4812448, 5050688, 6015560, 6313360, 6851840, 7970617, 9624896, 10101376, 12031120, 12626720, 13703680, 15941234, 19249792, 20202752, 24062240, 25253440, 31882468, 38499584, 39853085, 40405504, 48124480, 50506880, 63764936, 76999168, 79706170, 96248960, 101013760, 127529872, 159412340, 192497920, 202027520, 255059744, 318824680, 384995840, 510119488, 637649360, 1020238976, 1275298720, 2040477952, 2550597440, 4080955904, 5101194880, 10202389760, 20404779520]

約数ペア:

[(1, 20404779520), (2, 10202389760), (4, 5101194880), (5, 4080955904), (8, 2550597440), (10, 2040477952), (16, 1275298720), (20, 1020238976), (32, 637649360), (40, 510119488), (53, 384995840), (64, 318824680), (80, 255059744), (101, 202027520), (106, 192497920), (128, 159412340), (160, 127529872), (202, 101013760), (212, 96248960), (256, 79706170), (265, 76999168), (320, 63764936), (404, 50506880), (424, 48124480), (505, 40405504), (512, 39853085), (530, 38499584), (640, 31882468), (808, 25253440), (848, 24062240), (1010, 20202752), (1060, 19249792), (1280, 15941234), (1489, 13703680), (1616, 12626720), (1696, 12031120), (2020, 10101376), (2120, 9624896), (2560, 7970617), (2978, 6851840), (3232, 6313360), (3392, 6015560), (4040, 5050688), (4240, 4812448), (5353, 3811840), (5956, 3425920), (6464, 3156680), (6784, 3007780), (7445, 2740736), (8080, 2525344), (8480, 2406224), (10706, 1905920), (11912, 1712960), (12928, 1578340), (13568, 1503890), (14890, 1370368), (16160, 1262672), (16960, 1203112), (21412, 952960), (23824, 856480), (25856, 789170), (26765, 762368), (27136, 751945), (29780, 685184), (32320, 631336), (33920, 601556), (42824, 476480), (47648, 428240), (51712, 394585), (53530, 381184), (59560, 342592), (64640, 315668), (67840, 300778), (78917, 258560), (85648, 238240), (95296, 214120), (107060, 190592), (119120, 171296), (129280, 157834), (135680, 150389)]