78865640

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{281663}}^1$

素因数の和:281681

約数の個数: 32

約数和(自身を含む): 202798080

約数和(自身を除く): 123932440

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 281663, 563326, 1126652, 1408315, 1971641, 2253304, 2816630, 3943282, 5633260, 7886564, 9858205, 11266520, 15773128, 19716410, 39432820, 78865640]

約数ペア:

[(1, 78865640), (2, 39432820), (4, 19716410), (5, 15773128), (7, 11266520), (8, 9858205), (10, 7886564), (14, 5633260), (20, 3943282), (28, 2816630), (35, 2253304), (40, 1971641), (56, 1408315), (70, 1126652), (140, 563326), (280, 281663)]