21208668

素因数分解:

$2^2\times 3^1\times {\mathrm{13}}^1\times {\mathrm{23}}^2\times {\mathrm{257}}^1$

素因数の和:323

約数の個数: 72

約数和(自身を含む): 55928208

約数和(自身を除く): 34719540

約数列:

[1, 2, 3, 4, 6, 12, 13, 23, 26, 39, 46, 52, 69, 78, 92, 138, 156, 257, 276, 299, 514, 529, 598, 771, 897, 1028, 1058, 1196, 1542, 1587, 1794, 2116, 3084, 3174, 3341, 3588, 5911, 6348, 6682, 6877, 10023, 11822, 13364, 13754, 17733, 20046, 20631, 23644, 27508, 35466, 40092, 41262, 70932, 76843, 82524, 135953, 153686, 230529, 271906, 307372, 407859, 461058, 543812, 815718, 922116, 1631436, 1767389, 3534778, 5302167, 7069556, 10604334, 21208668]

約数ペア:

[(1, 21208668), (2, 10604334), (3, 7069556), (4, 5302167), (6, 3534778), (12, 1767389), (13, 1631436), (23, 922116), (26, 815718), (39, 543812), (46, 461058), (52, 407859), (69, 307372), (78, 271906), (92, 230529), (138, 153686), (156, 135953), (257, 82524), (276, 76843), (299, 70932), (514, 41262), (529, 40092), (598, 35466), (771, 27508), (897, 23644), (1028, 20631), (1058, 20046), (1196, 17733), (1542, 13754), (1587, 13364), (1794, 11822), (2116, 10023), (3084, 6877), (3174, 6682), (3341, 6348), (3588, 5911)]