81384320

素因数分解:

$2^7\times 5^1\times {\mathrm{127163}}^1$

素因数の和:127182

約数の個数: 32

約数和(自身を含む): 194560920

約数和(自身を除く): 113176600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 127163, 254326, 508652, 635815, 1017304, 1271630, 2034608, 2543260, 4069216, 5086520, 8138432, 10173040, 16276864, 20346080, 40692160, 81384320]

約数ペア:

[(1, 81384320), (2, 40692160), (4, 20346080), (5, 16276864), (8, 10173040), (10, 8138432), (16, 5086520), (20, 4069216), (32, 2543260), (40, 2034608), (64, 1271630), (80, 1017304), (128, 635815), (160, 508652), (320, 254326), (640, 127163)]