21791692

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{7907}}^1$

素因数の和:7977

約数の個数: 24

約数和(自身を含む): 41849136

約数和(自身を除く): 20057444

約数列:

[1, 2, 4, 13, 26, 52, 53, 106, 212, 689, 1378, 2756, 7907, 15814, 31628, 102791, 205582, 411164, 419071, 838142, 1676284, 5447923, 10895846, 21791692]

約数ペア:

[(1, 21791692), (2, 10895846), (4, 5447923), (13, 1676284), (26, 838142), (52, 419071), (53, 411164), (106, 205582), (212, 102791), (689, 31628), (1378, 15814), (2756, 7907)]