9984020

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{79}}^1\times {\mathrm{89}}^1$

素因数の和:248

約数の個数: 48

約数和(自身を含む): 21772800

約数和(自身を除く): 11788780

約数列:

[1, 2, 4, 5, 10, 20, 71, 79, 89, 142, 158, 178, 284, 316, 355, 356, 395, 445, 710, 790, 890, 1420, 1580, 1780, 5609, 6319, 7031, 11218, 12638, 14062, 22436, 25276, 28045, 28124, 31595, 35155, 56090, 63190, 70310, 112180, 126380, 140620, 499201, 998402, 1996804, 2496005, 4992010, 9984020]

約数ペア:

[(1, 9984020), (2, 4992010), (4, 2496005), (5, 1996804), (10, 998402), (20, 499201), (71, 140620), (79, 126380), (89, 112180), (142, 70310), (158, 63190), (178, 56090), (284, 35155), (316, 31595), (355, 28124), (356, 28045), (395, 25276), (445, 22436), (710, 14062), (790, 12638), (890, 11218), (1420, 7031), (1580, 6319), (1780, 5609)]