1215280

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{1381}}^1$

素因数の和:1405

約数の個数: 40

約数和(自身を含む): 3084624

約数和(自身を除く): 1869344

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 440, 880, 1381, 2762, 5524, 6905, 11048, 13810, 15191, 22096, 27620, 30382, 55240, 60764, 75955, 110480, 121528, 151910, 243056, 303820, 607640, 1215280]

約数ペア:

[(1, 1215280), (2, 607640), (4, 303820), (5, 243056), (8, 151910), (10, 121528), (11, 110480), (16, 75955), (20, 60764), (22, 55240), (40, 30382), (44, 27620), (55, 22096), (80, 15191), (88, 13810), (110, 11048), (176, 6905), (220, 5524), (440, 2762), (880, 1381)]