15911240

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{6521}}^1$

素因数の和:6593

約数の個数: 32

約数和(自身を含む): 36392760

約数和(自身を除く): 20481520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 6521, 13042, 26084, 32605, 52168, 65210, 130420, 260840, 397781, 795562, 1591124, 1988905, 3182248, 3977810, 7955620, 15911240]

約数ペア:

[(1, 15911240), (2, 7955620), (4, 3977810), (5, 3182248), (8, 1988905), (10, 1591124), (20, 795562), (40, 397781), (61, 260840), (122, 130420), (244, 65210), (305, 52168), (488, 32605), (610, 26084), (1220, 13042), (2440, 6521)]