18587440

素因数分解:

$2^4\times 5^1\times {\mathrm{283}}^1\times {\mathrm{821}}^1$

素因数の和:1117

約数の個数: 40

約数和(自身を含む): 43421328

約数和(自身を除く): 24833888

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 283, 566, 821, 1132, 1415, 1642, 2264, 2830, 3284, 4105, 4528, 5660, 6568, 8210, 11320, 13136, 16420, 22640, 32840, 65680, 232343, 464686, 929372, 1161715, 1858744, 2323430, 3717488, 4646860, 9293720, 18587440]

約数ペア:

[(1, 18587440), (2, 9293720), (4, 4646860), (5, 3717488), (8, 2323430), (10, 1858744), (16, 1161715), (20, 929372), (40, 464686), (80, 232343), (283, 65680), (566, 32840), (821, 22640), (1132, 16420), (1415, 13136), (1642, 11320), (2264, 8210), (2830, 6568), (3284, 5660), (4105, 4528)]