21286867

素因数分解:

$7^1\times {\mathrm{53}}^1\times {\mathrm{181}}^1\times {\mathrm{317}}^1$

素因数の和:558

約数の個数: 16

約数和(自身を含む): 25002432

約数和(自身を除く): 3715565

約数列:

[1, 7, 53, 181, 317, 371, 1267, 2219, 9593, 16801, 57377, 67151, 117607, 401639, 3040981, 21286867]

約数ペア:

[(1, 21286867), (7, 3040981), (53, 401639), (181, 117607), (317, 67151), (371, 57377), (1267, 16801), (2219, 9593)]