21388164

素因数分解:

$2^2\times 3^1\times 7^1\times {\mathrm{101}}^1\times {\mathrm{2521}}^1$

素因数の和:2636

約数の個数: 48

約数和(自身を含む): 57622656

約数和(自身を除く): 36234492

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84, 101, 202, 303, 404, 606, 707, 1212, 1414, 2121, 2521, 2828, 4242, 5042, 7563, 8484, 10084, 15126, 17647, 30252, 35294, 52941, 70588, 105882, 211764, 254621, 509242, 763863, 1018484, 1527726, 1782347, 3055452, 3564694, 5347041, 7129388, 10694082, 21388164]

約数ペア:

[(1, 21388164), (2, 10694082), (3, 7129388), (4, 5347041), (6, 3564694), (7, 3055452), (12, 1782347), (14, 1527726), (21, 1018484), (28, 763863), (42, 509242), (84, 254621), (101, 211764), (202, 105882), (303, 70588), (404, 52941), (606, 35294), (707, 30252), (1212, 17647), (1414, 15126), (2121, 10084), (2521, 8484), (2828, 7563), (4242, 5042)]