80188820

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{149}}^1\times {\mathrm{379}}^1$

素因数の和:608

約数の個数: 48

約数和(自身を含む): 172368000

約数和(自身を除く): 92179180

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 149, 284, 298, 355, 379, 596, 710, 745, 758, 1420, 1490, 1516, 1895, 2980, 3790, 7580, 10579, 21158, 26909, 42316, 52895, 53818, 56471, 105790, 107636, 112942, 134545, 211580, 225884, 269090, 282355, 538180, 564710, 1129420, 4009441, 8018882, 16037764, 20047205, 40094410, 80188820]

約数ペア:

[(1, 80188820), (2, 40094410), (4, 20047205), (5, 16037764), (10, 8018882), (20, 4009441), (71, 1129420), (142, 564710), (149, 538180), (284, 282355), (298, 269090), (355, 225884), (379, 211580), (596, 134545), (710, 112942), (745, 107636), (758, 105790), (1420, 56471), (1490, 53818), (1516, 52895), (1895, 42316), (2980, 26909), (3790, 21158), (7580, 10579)]