515504020

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{89}}^1\times {\mathrm{4079}}^1$

素因数の和:4248

約数の個数: 48

約数和(自身を含む): 1110412800

約数和(自身を除く): 594908780

約数列:

[1, 2, 4, 5, 10, 20, 71, 89, 142, 178, 284, 355, 356, 445, 710, 890, 1420, 1780, 4079, 6319, 8158, 12638, 16316, 20395, 25276, 31595, 40790, 63190, 81580, 126380, 289609, 363031, 579218, 726062, 1158436, 1448045, 1452124, 1815155, 2896090, 3630310, 5792180, 7260620, 25775201, 51550402, 103100804, 128876005, 257752010, 515504020]

約数ペア:

[(1, 515504020), (2, 257752010), (4, 128876005), (5, 103100804), (10, 51550402), (20, 25775201), (71, 7260620), (89, 5792180), (142, 3630310), (178, 2896090), (284, 1815155), (355, 1452124), (356, 1448045), (445, 1158436), (710, 726062), (890, 579218), (1420, 363031), (1780, 289609), (4079, 126380), (6319, 81580), (8158, 63190), (12638, 40790), (16316, 31595), (20395, 25276)]