21017565

素因数分解:

$3^2\times 5^1\times {\mathrm{67}}^1\times {\mathrm{6971}}^1$

素因数の和:7049

約数の個数: 24

約数和(自身を含む): 36979488

約数和(自身を除く): 15961923

約数列:

[1, 3, 5, 9, 15, 45, 67, 201, 335, 603, 1005, 3015, 6971, 20913, 34855, 62739, 104565, 313695, 467057, 1401171, 2335285, 4203513, 7005855, 21017565]

約数ペア:

[(1, 21017565), (3, 7005855), (5, 4203513), (9, 2335285), (15, 1401171), (45, 467057), (67, 313695), (201, 104565), (335, 62739), (603, 34855), (1005, 20913), (3015, 6971)]