21395660

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{7481}}^1$

素因数の和:7514

約数の個数: 48

約数和(自身を含む): 52792992

約数和(自身を除く): 31397332

約数列:

[1, 2, 4, 5, 10, 11, 13, 20, 22, 26, 44, 52, 55, 65, 110, 130, 143, 220, 260, 286, 572, 715, 1430, 2860, 7481, 14962, 29924, 37405, 74810, 82291, 97253, 149620, 164582, 194506, 329164, 389012, 411455, 486265, 822910, 972530, 1069783, 1645820, 1945060, 2139566, 4279132, 5348915, 10697830, 21395660]

約数ペア:

[(1, 21395660), (2, 10697830), (4, 5348915), (5, 4279132), (10, 2139566), (11, 1945060), (13, 1645820), (20, 1069783), (22, 972530), (26, 822910), (44, 486265), (52, 411455), (55, 389012), (65, 329164), (110, 194506), (130, 164582), (143, 149620), (220, 97253), (260, 82291), (286, 74810), (572, 37405), (715, 29924), (1430, 14962), (2860, 7481)]