21789970

素因数分解:

$2^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{211}}^1\times {\mathrm{449}}^1$

素因数の和:690

約数の個数: 32

約数和(自身を含む): 41212800

約数和(自身を除く): 19422830

約数列:

[1, 2, 5, 10, 23, 46, 115, 211, 230, 422, 449, 898, 1055, 2110, 2245, 4490, 4853, 9706, 10327, 20654, 24265, 48530, 51635, 94739, 103270, 189478, 473695, 947390, 2178997, 4357994, 10894985, 21789970]

約数ペア:

[(1, 21789970), (2, 10894985), (5, 4357994), (10, 2178997), (23, 947390), (46, 473695), (115, 189478), (211, 103270), (230, 94739), (422, 51635), (449, 48530), (898, 24265), (1055, 20654), (2110, 10327), (2245, 9706), (4490, 4853)]