15211855

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{251}}^1$

素因数の和:327

約数の個数: 32

約数和(自身を含む): 20901888

約数和(自身を除く): 5690033

約数列:

[1, 5, 17, 23, 31, 85, 115, 155, 251, 391, 527, 713, 1255, 1955, 2635, 3565, 4267, 5773, 7781, 12121, 21335, 28865, 38905, 60605, 98141, 132277, 178963, 490705, 661385, 894815, 3042371, 15211855]

約数ペア:

[(1, 15211855), (5, 3042371), (17, 894815), (23, 661385), (31, 490705), (85, 178963), (115, 132277), (155, 98141), (251, 60605), (391, 38905), (527, 28865), (713, 21335), (1255, 12121), (1955, 7781), (2635, 5773), (3565, 4267)]