42121220

素因数分解:

$2^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{79}}^1\times {\mathrm{503}}^1$

素因数の和:644

約数の個数: 48

約数和(自身を含む): 91445760

約数和(自身を除く): 49324540

約数列:

[1, 2, 4, 5, 10, 20, 53, 79, 106, 158, 212, 265, 316, 395, 503, 530, 790, 1006, 1060, 1580, 2012, 2515, 4187, 5030, 8374, 10060, 16748, 20935, 26659, 39737, 41870, 53318, 79474, 83740, 106636, 133295, 158948, 198685, 266590, 397370, 533180, 794740, 2106061, 4212122, 8424244, 10530305, 21060610, 42121220]

約数ペア:

[(1, 42121220), (2, 21060610), (4, 10530305), (5, 8424244), (10, 4212122), (20, 2106061), (53, 794740), (79, 533180), (106, 397370), (158, 266590), (212, 198685), (265, 158948), (316, 133295), (395, 106636), (503, 83740), (530, 79474), (790, 53318), (1006, 41870), (1060, 39737), (1580, 26659), (2012, 20935), (2515, 16748), (4187, 10060), (5030, 8374)]