30721240

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{69821}}^1$

素因数の和:69843

約数の個数: 32

約数和(自身を含む): 75407760

約数和(自身を除く): 44686520

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 69821, 139642, 279284, 349105, 558568, 698210, 768031, 1396420, 1536062, 2792840, 3072124, 3840155, 6144248, 7680310, 15360620, 30721240]

約数ペア:

[(1, 30721240), (2, 15360620), (4, 7680310), (5, 6144248), (8, 3840155), (10, 3072124), (11, 2792840), (20, 1536062), (22, 1396420), (40, 768031), (44, 698210), (55, 558568), (88, 349105), (110, 279284), (220, 139642), (440, 69821)]