18689240

素因数分解:

$2^3\times 5^1\times {\mathrm{659}}^1\times {\mathrm{709}}^1$

素因数の和:1379

約数の個数: 32

約数和(自身を含む): 42174000

約数和(自身を除く): 23484760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 659, 709, 1318, 1418, 2636, 2836, 3295, 3545, 5272, 5672, 6590, 7090, 13180, 14180, 26360, 28360, 467231, 934462, 1868924, 2336155, 3737848, 4672310, 9344620, 18689240]

約数ペア:

[(1, 18689240), (2, 9344620), (4, 4672310), (5, 3737848), (8, 2336155), (10, 1868924), (20, 934462), (40, 467231), (659, 28360), (709, 26360), (1318, 14180), (1418, 13180), (2636, 7090), (2836, 6590), (3295, 5672), (3545, 5272)]