21259792

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{1663}}^1$

素因数の和:1735

約数の個数: 40

約数和(自身を含む): 44568576

約数和(自身を除く): 23308784

約数列:

[1, 2, 4, 8, 16, 17, 34, 47, 68, 94, 136, 188, 272, 376, 752, 799, 1598, 1663, 3196, 3326, 6392, 6652, 12784, 13304, 26608, 28271, 56542, 78161, 113084, 156322, 226168, 312644, 452336, 625288, 1250576, 1328737, 2657474, 5314948, 10629896, 21259792]

約数ペア:

[(1, 21259792), (2, 10629896), (4, 5314948), (8, 2657474), (16, 1328737), (17, 1250576), (34, 625288), (47, 452336), (68, 312644), (94, 226168), (136, 156322), (188, 113084), (272, 78161), (376, 56542), (752, 28271), (799, 26608), (1598, 13304), (1663, 12784), (3196, 6652), (3326, 6392)]