211110020

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{15731}}^1$

素因数の和:15812

約数の個数: 48

約数和(自身を含む): 491593536

約数和(自身を除く): 280483516

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 61, 110, 122, 220, 244, 305, 610, 671, 1220, 1342, 2684, 3355, 6710, 13420, 15731, 31462, 62924, 78655, 157310, 173041, 314620, 346082, 692164, 865205, 959591, 1730410, 1919182, 3460820, 3838364, 4797955, 9595910, 10555501, 19191820, 21111002, 42222004, 52777505, 105555010, 211110020]

約数ペア:

[(1, 211110020), (2, 105555010), (4, 52777505), (5, 42222004), (10, 21111002), (11, 19191820), (20, 10555501), (22, 9595910), (44, 4797955), (55, 3838364), (61, 3460820), (110, 1919182), (122, 1730410), (220, 959591), (244, 865205), (305, 692164), (610, 346082), (671, 314620), (1220, 173041), (1342, 157310), (2684, 78655), (3355, 62924), (6710, 31462), (13420, 15731)]