21585800

素因数分解:

$2^3\times 5^2\times {\mathrm{37}}^1\times {\mathrm{2917}}^1$

素因数の和:2970

約数の個数: 48

約数和(自身を含む): 51561060

約数和(自身を除く): 29975260

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 37, 40, 50, 74, 100, 148, 185, 200, 296, 370, 740, 925, 1480, 1850, 2917, 3700, 5834, 7400, 11668, 14585, 23336, 29170, 58340, 72925, 107929, 116680, 145850, 215858, 291700, 431716, 539645, 583400, 863432, 1079290, 2158580, 2698225, 4317160, 5396450, 10792900, 21585800]

約数ペア:

[(1, 21585800), (2, 10792900), (4, 5396450), (5, 4317160), (8, 2698225), (10, 2158580), (20, 1079290), (25, 863432), (37, 583400), (40, 539645), (50, 431716), (74, 291700), (100, 215858), (148, 145850), (185, 116680), (200, 107929), (296, 72925), (370, 58340), (740, 29170), (925, 23336), (1480, 14585), (1850, 11668), (2917, 7400), (3700, 5834)]