19561980

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{79}}^1\times {\mathrm{4127}}^1$

素因数の和:4218

約数の個数: 48

約数和(自身を含む): 55480320

約数和(自身を除く): 35918340

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 79, 158, 237, 316, 395, 474, 790, 948, 1185, 1580, 2370, 4127, 4740, 8254, 12381, 16508, 20635, 24762, 41270, 49524, 61905, 82540, 123810, 247620, 326033, 652066, 978099, 1304132, 1630165, 1956198, 3260330, 3912396, 4890495, 6520660, 9780990, 19561980]

約数ペア:

[(1, 19561980), (2, 9780990), (3, 6520660), (4, 4890495), (5, 3912396), (6, 3260330), (10, 1956198), (12, 1630165), (15, 1304132), (20, 978099), (30, 652066), (60, 326033), (79, 247620), (158, 123810), (237, 82540), (316, 61905), (395, 49524), (474, 41270), (790, 24762), (948, 20635), (1185, 16508), (1580, 12381), (2370, 8254), (4127, 4740)]