9972000020

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{73}}^1\times {\mathrm{220327}}^1$

素因数の和:220440

約数の個数: 48

約数和(自身を含む): 21912941568

約数和(自身を除く): 11940941548

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 73, 124, 146, 155, 292, 310, 365, 620, 730, 1460, 2263, 4526, 9052, 11315, 22630, 45260, 220327, 440654, 881308, 1101635, 2203270, 4406540, 6830137, 13660274, 16083871, 27320548, 32167742, 34150685, 64335484, 68301370, 80419355, 136602740, 160838710, 321677420, 498600001, 997200002, 1994400004, 2493000005, 4986000010, 9972000020]

約数ペア:

[(1, 9972000020), (2, 4986000010), (4, 2493000005), (5, 1994400004), (10, 997200002), (20, 498600001), (31, 321677420), (62, 160838710), (73, 136602740), (124, 80419355), (146, 68301370), (155, 64335484), (292, 34150685), (310, 32167742), (365, 27320548), (620, 16083871), (730, 13660274), (1460, 6830137), (2263, 4406540), (4526, 2203270), (9052, 1101635), (11315, 881308), (22630, 440654), (45260, 220327)]