638040

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{409}}^1$

素因数の和:436

約数の個数: 64

約数和(自身を含む): 2066400

約数和(自身を除く): 1428360

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 20, 24, 26, 30, 39, 40, 52, 60, 65, 78, 104, 120, 130, 156, 195, 260, 312, 390, 409, 520, 780, 818, 1227, 1560, 1636, 2045, 2454, 3272, 4090, 4908, 5317, 6135, 8180, 9816, 10634, 12270, 15951, 16360, 21268, 24540, 26585, 31902, 42536, 49080, 53170, 63804, 79755, 106340, 127608, 159510, 212680, 319020, 638040]

約数ペア:

[(1, 638040), (2, 319020), (3, 212680), (4, 159510), (5, 127608), (6, 106340), (8, 79755), (10, 63804), (12, 53170), (13, 49080), (15, 42536), (20, 31902), (24, 26585), (26, 24540), (30, 21268), (39, 16360), (40, 15951), (52, 12270), (60, 10634), (65, 9816), (78, 8180), (104, 6135), (120, 5317), (130, 4908), (156, 4090), (195, 3272), (260, 2454), (312, 2045), (390, 1636), (409, 1560), (520, 1227), (780, 818)]