21306455

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{101}}^1\times {\mathrm{1361}}^1$

素因数の和:1498

約数の個数: 16

約数和(自身を含む): 26673408

約数和(自身を除く): 5366953

約数列:

[1, 5, 31, 101, 155, 505, 1361, 3131, 6805, 15655, 42191, 137461, 210955, 687305, 4261291, 21306455]

約数ペア:

[(1, 21306455), (5, 4261291), (31, 687305), (101, 210955), (155, 137461), (505, 42191), (1361, 15655), (3131, 6805)]