20912640

素因数分解:

$2^9\times 3^1\times 5^1\times 7^1\times {\mathrm{389}}^1$

素因数の和:422

約数の個数: 160

約数和(自身を含む): 76602240

約数和(自身を除く): 55689600

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 32, 35, 40, 42, 48, 56, 60, 64, 70, 80, 84, 96, 105, 112, 120, 128, 140, 160, 168, 192, 210, 224, 240, 256, 280, 320, 336, 384, 389, 420, 448, 480, 512, 560, 640, 672, 768, 778, 840, 896, 960, 1120, 1167, 1280, 1344, 1536, 1556, 1680, 1792, 1920, 1945, 2240, 2334, 2560, 2688, 2723, 3112, 3360, 3584, 3840, 3890, 4480, 4668, 5376, 5446, 5835, 6224, 6720, 7680, 7780, 8169, 8960, 9336, 10752, 10892, 11670, 12448, 13440, 13615, 15560, 16338, 17920, 18672, 21784, 23340, 24896, 26880, 27230, 31120, 32676, 37344, 40845, 43568, 46680, 49792, 53760, 54460, 62240, 65352, 74688, 81690, 87136, 93360, 99584, 108920, 124480, 130704, 149376, 163380, 174272, 186720, 199168, 217840, 248960, 261408, 298752, 326760, 348544, 373440, 435680, 497920, 522816, 597504, 653520, 697088, 746880, 871360, 995840, 1045632, 1307040, 1394176, 1493760, 1742720, 2091264, 2614080, 2987520, 3485440, 4182528, 5228160, 6970880, 10456320, 20912640]

約数ペア:

[(1, 20912640), (2, 10456320), (3, 6970880), (4, 5228160), (5, 4182528), (6, 3485440), (7, 2987520), (8, 2614080), (10, 2091264), (12, 1742720), (14, 1493760), (15, 1394176), (16, 1307040), (20, 1045632), (21, 995840), (24, 871360), (28, 746880), (30, 697088), (32, 653520), (35, 597504), (40, 522816), (42, 497920), (48, 435680), (56, 373440), (60, 348544), (64, 326760), (70, 298752), (80, 261408), (84, 248960), (96, 217840), (105, 199168), (112, 186720), (120, 174272), (128, 163380), (140, 149376), (160, 130704), (168, 124480), (192, 108920), (210, 99584), (224, 93360), (240, 87136), (256, 81690), (280, 74688), (320, 65352), (336, 62240), (384, 54460), (389, 53760), (420, 49792), (448, 46680), (480, 43568), (512, 40845), (560, 37344), (640, 32676), (672, 31120), (768, 27230), (778, 26880), (840, 24896), (896, 23340), (960, 21784), (1120, 18672), (1167, 17920), (1280, 16338), (1344, 15560), (1536, 13615), (1556, 13440), (1680, 12448), (1792, 11670), (1920, 10892), (1945, 10752), (2240, 9336), (2334, 8960), (2560, 8169), (2688, 7780), (2723, 7680), (3112, 6720), (3360, 6224), (3584, 5835), (3840, 5446), (3890, 5376), (4480, 4668)]