20976560

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^3\times {\mathrm{197}}^1$

素因数の和:243

約数の個数: 80

約数和(自身を含む): 53916192

約数和(自身を除く): 32939632

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 121, 176, 197, 220, 242, 394, 440, 484, 605, 788, 880, 968, 985, 1210, 1331, 1576, 1936, 1970, 2167, 2420, 2662, 3152, 3940, 4334, 4840, 5324, 6655, 7880, 8668, 9680, 10648, 10835, 13310, 15760, 17336, 21296, 21670, 23837, 26620, 34672, 43340, 47674, 53240, 86680, 95348, 106480, 119185, 173360, 190696, 238370, 262207, 381392, 476740, 524414, 953480, 1048828, 1311035, 1906960, 2097656, 2622070, 4195312, 5244140, 10488280, 20976560]

約数ペア:

[(1, 20976560), (2, 10488280), (4, 5244140), (5, 4195312), (8, 2622070), (10, 2097656), (11, 1906960), (16, 1311035), (20, 1048828), (22, 953480), (40, 524414), (44, 476740), (55, 381392), (80, 262207), (88, 238370), (110, 190696), (121, 173360), (176, 119185), (197, 106480), (220, 95348), (242, 86680), (394, 53240), (440, 47674), (484, 43340), (605, 34672), (788, 26620), (880, 23837), (968, 21670), (985, 21296), (1210, 17336), (1331, 15760), (1576, 13310), (1936, 10835), (1970, 10648), (2167, 9680), (2420, 8668), (2662, 7880), (3152, 6655), (3940, 5324), (4334, 4840)]