248979980

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{181}}^1\times {\mathrm{631}}^1$

素因数の和:930

約数の個数: 48

約数和(自身を含む): 531410880

約数和(自身を除く): 282430900

約数列:

[1, 2, 4, 5, 10, 20, 109, 181, 218, 362, 436, 545, 631, 724, 905, 1090, 1262, 1810, 2180, 2524, 3155, 3620, 6310, 12620, 19729, 39458, 68779, 78916, 98645, 114211, 137558, 197290, 228422, 275116, 343895, 394580, 456844, 571055, 687790, 1142110, 1375580, 2284220, 12448999, 24897998, 49795996, 62244995, 124489990, 248979980]

約数ペア:

[(1, 248979980), (2, 124489990), (4, 62244995), (5, 49795996), (10, 24897998), (20, 12448999), (109, 2284220), (181, 1375580), (218, 1142110), (362, 687790), (436, 571055), (545, 456844), (631, 394580), (724, 343895), (905, 275116), (1090, 228422), (1262, 197290), (1810, 137558), (2180, 114211), (2524, 98645), (3155, 78916), (3620, 68779), (6310, 39458), (12620, 19729)]