21709820

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{8971}}^1$

素因数の和:9002

約数の個数: 36

約数和(自身を含む): 50117592

約数和(自身を除く): 28407772

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 121, 220, 242, 484, 605, 1210, 2420, 8971, 17942, 35884, 44855, 89710, 98681, 179420, 197362, 394724, 493405, 986810, 1085491, 1973620, 2170982, 4341964, 5427455, 10854910, 21709820]

約数ペア:

[(1, 21709820), (2, 10854910), (4, 5427455), (5, 4341964), (10, 2170982), (11, 1973620), (20, 1085491), (22, 986810), (44, 493405), (55, 394724), (110, 197362), (121, 179420), (220, 98681), (242, 89710), (484, 44855), (605, 35884), (1210, 17942), (2420, 8971)]