20555600

素因数分解:

$2^4\times 5^2\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{67}}^1$

素因数の和:157

約数の個数: 120

約数和(自身を含む): 54892320

約数和(自身を除く): 34336720

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 40, 50, 52, 59, 65, 67, 80, 100, 104, 118, 130, 134, 200, 208, 236, 260, 268, 295, 325, 335, 400, 472, 520, 536, 590, 650, 670, 767, 871, 944, 1040, 1072, 1180, 1300, 1340, 1475, 1534, 1675, 1742, 2360, 2600, 2680, 2950, 3068, 3350, 3484, 3835, 3953, 4355, 4720, 5200, 5360, 5900, 6136, 6700, 6968, 7670, 7906, 8710, 11800, 12272, 13400, 13936, 15340, 15812, 17420, 19175, 19765, 21775, 23600, 26800, 30680, 31624, 34840, 38350, 39530, 43550, 51389, 61360, 63248, 69680, 76700, 79060, 87100, 98825, 102778, 153400, 158120, 174200, 197650, 205556, 256945, 306800, 316240, 348400, 395300, 411112, 513890, 790600, 822224, 1027780, 1284725, 1581200, 2055560, 2569450, 4111120, 5138900, 10277800, 20555600]

約数ペア:

[(1, 20555600), (2, 10277800), (4, 5138900), (5, 4111120), (8, 2569450), (10, 2055560), (13, 1581200), (16, 1284725), (20, 1027780), (25, 822224), (26, 790600), (40, 513890), (50, 411112), (52, 395300), (59, 348400), (65, 316240), (67, 306800), (80, 256945), (100, 205556), (104, 197650), (118, 174200), (130, 158120), (134, 153400), (200, 102778), (208, 98825), (236, 87100), (260, 79060), (268, 76700), (295, 69680), (325, 63248), (335, 61360), (400, 51389), (472, 43550), (520, 39530), (536, 38350), (590, 34840), (650, 31624), (670, 30680), (767, 26800), (871, 23600), (944, 21775), (1040, 19765), (1072, 19175), (1180, 17420), (1300, 15812), (1340, 15340), (1475, 13936), (1534, 13400), (1675, 12272), (1742, 11800), (2360, 8710), (2600, 7906), (2680, 7670), (2950, 6968), (3068, 6700), (3350, 6136), (3484, 5900), (3835, 5360), (3953, 5200), (4355, 4720)]