19201520

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{499}}^1$

素因数の和:562

約数の個数: 80

約数和(自身を含む): 49476000

約数和(自身を除く): 30274480

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 37, 40, 52, 65, 74, 80, 104, 130, 148, 185, 208, 260, 296, 370, 481, 499, 520, 592, 740, 962, 998, 1040, 1480, 1924, 1996, 2405, 2495, 2960, 3848, 3992, 4810, 4990, 6487, 7696, 7984, 9620, 9980, 12974, 18463, 19240, 19960, 25948, 32435, 36926, 38480, 39920, 51896, 64870, 73852, 92315, 103792, 129740, 147704, 184630, 240019, 259480, 295408, 369260, 480038, 518960, 738520, 960076, 1200095, 1477040, 1920152, 2400190, 3840304, 4800380, 9600760, 19201520]

約数ペア:

[(1, 19201520), (2, 9600760), (4, 4800380), (5, 3840304), (8, 2400190), (10, 1920152), (13, 1477040), (16, 1200095), (20, 960076), (26, 738520), (37, 518960), (40, 480038), (52, 369260), (65, 295408), (74, 259480), (80, 240019), (104, 184630), (130, 147704), (148, 129740), (185, 103792), (208, 92315), (260, 73852), (296, 64870), (370, 51896), (481, 39920), (499, 38480), (520, 36926), (592, 32435), (740, 25948), (962, 19960), (998, 19240), (1040, 18463), (1480, 12974), (1924, 9980), (1996, 9620), (2405, 7984), (2495, 7696), (2960, 6487), (3848, 4990), (3992, 4810)]