81981405

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{5711}}^1$

素因数の和:5762

約数の個数: 48

約数和(自身を含む): 160392960

約数和(自身を除く): 78411555

約数列:

[1, 3, 5, 9, 11, 15, 29, 33, 45, 55, 87, 99, 145, 165, 261, 319, 435, 495, 957, 1305, 1595, 2871, 4785, 5711, 14355, 17133, 28555, 51399, 62821, 85665, 165619, 188463, 256995, 314105, 496857, 565389, 828095, 942315, 1490571, 1821809, 2484285, 2826945, 5465427, 7452855, 9109045, 16396281, 27327135, 81981405]

約数ペア:

[(1, 81981405), (3, 27327135), (5, 16396281), (9, 9109045), (11, 7452855), (15, 5465427), (29, 2826945), (33, 2484285), (45, 1821809), (55, 1490571), (87, 942315), (99, 828095), (145, 565389), (165, 496857), (261, 314105), (319, 256995), (435, 188463), (495, 165619), (957, 85665), (1305, 62821), (1595, 51399), (2871, 28555), (4785, 17133), (5711, 14355)]