20302760

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{73}}^1\times {\mathrm{409}}^1$

素因数の和:510

約数の個数: 64

約数和(自身を含む): 49150800

約数和(自身を除く): 28848040

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 73, 85, 136, 146, 170, 292, 340, 365, 409, 584, 680, 730, 818, 1241, 1460, 1636, 2045, 2482, 2920, 3272, 4090, 4964, 6205, 6953, 8180, 9928, 12410, 13906, 16360, 24820, 27812, 29857, 34765, 49640, 55624, 59714, 69530, 119428, 139060, 149285, 238856, 278120, 298570, 507569, 597140, 1015138, 1194280, 2030276, 2537845, 4060552, 5075690, 10151380, 20302760]

約数ペア:

[(1, 20302760), (2, 10151380), (4, 5075690), (5, 4060552), (8, 2537845), (10, 2030276), (17, 1194280), (20, 1015138), (34, 597140), (40, 507569), (68, 298570), (73, 278120), (85, 238856), (136, 149285), (146, 139060), (170, 119428), (292, 69530), (340, 59714), (365, 55624), (409, 49640), (584, 34765), (680, 29857), (730, 27812), (818, 24820), (1241, 16360), (1460, 13906), (1636, 12410), (2045, 9928), (2482, 8180), (2920, 6953), (3272, 6205), (4090, 4964)]