40745980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{2081}}^1$

素因数の和:2190

約数の個数: 48

約数和(自身を含む): 94439520

約数和(自身を除く): 53693540

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 89, 110, 178, 220, 356, 445, 890, 979, 1780, 1958, 2081, 3916, 4162, 4895, 8324, 9790, 10405, 19580, 20810, 22891, 41620, 45782, 91564, 114455, 185209, 228910, 370418, 457820, 740836, 926045, 1852090, 2037299, 3704180, 4074598, 8149196, 10186495, 20372990, 40745980]

約数ペア:

[(1, 40745980), (2, 20372990), (4, 10186495), (5, 8149196), (10, 4074598), (11, 3704180), (20, 2037299), (22, 1852090), (44, 926045), (55, 740836), (89, 457820), (110, 370418), (178, 228910), (220, 185209), (356, 114455), (445, 91564), (890, 45782), (979, 41620), (1780, 22891), (1958, 20810), (2081, 19580), (3916, 10405), (4162, 9790), (4895, 8324)]