20171920

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{577}}^1$

素因数の和:632

約数の個数: 80

約数和(自身を含む): 51603840

約数和(自身を除く): 31431920

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 23, 38, 40, 46, 76, 80, 92, 95, 115, 152, 184, 190, 230, 304, 368, 380, 437, 460, 577, 760, 874, 920, 1154, 1520, 1748, 1840, 2185, 2308, 2885, 3496, 4370, 4616, 5770, 6992, 8740, 9232, 10963, 11540, 13271, 17480, 21926, 23080, 26542, 34960, 43852, 46160, 53084, 54815, 66355, 87704, 106168, 109630, 132710, 175408, 212336, 219260, 252149, 265420, 438520, 504298, 530840, 877040, 1008596, 1061680, 1260745, 2017192, 2521490, 4034384, 5042980, 10085960, 20171920]

約数ペア:

[(1, 20171920), (2, 10085960), (4, 5042980), (5, 4034384), (8, 2521490), (10, 2017192), (16, 1260745), (19, 1061680), (20, 1008596), (23, 877040), (38, 530840), (40, 504298), (46, 438520), (76, 265420), (80, 252149), (92, 219260), (95, 212336), (115, 175408), (152, 132710), (184, 109630), (190, 106168), (230, 87704), (304, 66355), (368, 54815), (380, 53084), (437, 46160), (460, 43852), (577, 34960), (760, 26542), (874, 23080), (920, 21926), (1154, 17480), (1520, 13271), (1748, 11540), (1840, 10963), (2185, 9232), (2308, 8740), (2885, 6992), (3496, 5770), (4370, 4616)]