20456920

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{2447}}^1$

素因数の和:2488

約数の個数: 64

約数和(自身を含む): 52876800

約数和(自身を除く): 32419880

約数列:

[1, 2, 4, 5, 8, 10, 11, 19, 20, 22, 38, 40, 44, 55, 76, 88, 95, 110, 152, 190, 209, 220, 380, 418, 440, 760, 836, 1045, 1672, 2090, 2447, 4180, 4894, 8360, 9788, 12235, 19576, 24470, 26917, 46493, 48940, 53834, 92986, 97880, 107668, 134585, 185972, 215336, 232465, 269170, 371944, 464930, 511423, 538340, 929860, 1022846, 1076680, 1859720, 2045692, 2557115, 4091384, 5114230, 10228460, 20456920]

約数ペア:

[(1, 20456920), (2, 10228460), (4, 5114230), (5, 4091384), (8, 2557115), (10, 2045692), (11, 1859720), (19, 1076680), (20, 1022846), (22, 929860), (38, 538340), (40, 511423), (44, 464930), (55, 371944), (76, 269170), (88, 232465), (95, 215336), (110, 185972), (152, 134585), (190, 107668), (209, 97880), (220, 92986), (380, 53834), (418, 48940), (440, 46493), (760, 26917), (836, 24470), (1045, 19576), (1672, 12235), (2090, 9788), (2447, 8360), (4180, 4894)]