990563620

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{313}}^1\times {\mathrm{2003}}^1$

素因数の和:2404

約数の個数: 48

約数和(自身を含む): 2114300160

約数和(自身を除く): 1123736540

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 313, 316, 395, 626, 790, 1252, 1565, 1580, 2003, 3130, 4006, 6260, 8012, 10015, 20030, 24727, 40060, 49454, 98908, 123635, 158237, 247270, 316474, 494540, 626939, 632948, 791185, 1253878, 1582370, 2507756, 3134695, 3164740, 6269390, 12538780, 49528181, 99056362, 198112724, 247640905, 495281810, 990563620]

約数ペア:

[(1, 990563620), (2, 495281810), (4, 247640905), (5, 198112724), (10, 99056362), (20, 49528181), (79, 12538780), (158, 6269390), (313, 3164740), (316, 3134695), (395, 2507756), (626, 1582370), (790, 1253878), (1252, 791185), (1565, 632948), (1580, 626939), (2003, 494540), (3130, 316474), (4006, 247270), (6260, 158237), (8012, 123635), (10015, 98908), (20030, 49454), (24727, 40060)]