401025640

素因数分解:

$2^3\times 5^1\times {\mathrm{163}}^1\times {\mathrm{61507}}^1$

素因数の和:61681

約数の個数: 32

約数和(自身を含む): 907858080

約数和(自身を除く): 506832440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 163, 326, 652, 815, 1304, 1630, 3260, 6520, 61507, 123014, 246028, 307535, 492056, 615070, 1230140, 2460280, 10025641, 20051282, 40102564, 50128205, 80205128, 100256410, 200512820, 401025640]

約数ペア:

[(1, 401025640), (2, 200512820), (4, 100256410), (5, 80205128), (8, 50128205), (10, 40102564), (20, 20051282), (40, 10025641), (163, 2460280), (326, 1230140), (652, 615070), (815, 492056), (1304, 307535), (1630, 246028), (3260, 123014), (6520, 61507)]