81125320

素因数分解:

$2^3\times 5^1\times {\mathrm{449}}^1\times {\mathrm{4517}}^1$

素因数の和:4977

約数の個数: 32

約数和(自身を含む): 182979000

約数和(自身を除く): 101853680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 449, 898, 1796, 2245, 3592, 4490, 4517, 8980, 9034, 17960, 18068, 22585, 36136, 45170, 90340, 180680, 2028133, 4056266, 8112532, 10140665, 16225064, 20281330, 40562660, 81125320]

約数ペア:

[(1, 81125320), (2, 40562660), (4, 20281330), (5, 16225064), (8, 10140665), (10, 8112532), (20, 4056266), (40, 2028133), (449, 180680), (898, 90340), (1796, 45170), (2245, 36136), (3592, 22585), (4490, 18068), (4517, 17960), (8980, 9034)]