78781640

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{281363}}^1$

素因数の和:281381

約数の個数: 32

約数和(自身を含む): 202582080

約数和(自身を除く): 123800440

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 281363, 562726, 1125452, 1406815, 1969541, 2250904, 2813630, 3939082, 5627260, 7878164, 9847705, 11254520, 15756328, 19695410, 39390820, 78781640]

約数ペア:

[(1, 78781640), (2, 39390820), (4, 19695410), (5, 15756328), (7, 11254520), (8, 9847705), (10, 7878164), (14, 5627260), (20, 3939082), (28, 2813630), (35, 2250904), (40, 1969541), (56, 1406815), (70, 1125452), (140, 562726), (280, 281363)]