19561480

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{8017}}^1$

素因数の和:8089

約数の個数: 32

約数和(自身を含む): 44740440

約数和(自身を除く): 25178960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 8017, 16034, 32068, 40085, 64136, 80170, 160340, 320680, 489037, 978074, 1956148, 2445185, 3912296, 4890370, 9780740, 19561480]

約数ペア:

[(1, 19561480), (2, 9780740), (4, 4890370), (5, 3912296), (8, 2445185), (10, 1956148), (20, 978074), (40, 489037), (61, 320680), (122, 160340), (244, 80170), (305, 64136), (488, 40085), (610, 32068), (1220, 16034), (2440, 8017)]