890666540

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{313}}^1\times {\mathrm{1801}}^1$

素因数の和:2202

約数の個数: 48

約数和(自身を含む): 1901182080

約数和(自身を除く): 1010515540

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 313, 316, 395, 626, 790, 1252, 1565, 1580, 1801, 3130, 3602, 6260, 7204, 9005, 18010, 24727, 36020, 49454, 98908, 123635, 142279, 247270, 284558, 494540, 563713, 569116, 711395, 1127426, 1422790, 2254852, 2818565, 2845580, 5637130, 11274260, 44533327, 89066654, 178133308, 222666635, 445333270, 890666540]

約数ペア:

[(1, 890666540), (2, 445333270), (4, 222666635), (5, 178133308), (10, 89066654), (20, 44533327), (79, 11274260), (158, 5637130), (313, 2845580), (316, 2818565), (395, 2254852), (626, 1422790), (790, 1127426), (1252, 711395), (1565, 569116), (1580, 563713), (1801, 494540), (3130, 284558), (3602, 247270), (6260, 142279), (7204, 123635), (9005, 98908), (18010, 49454), (24727, 36020)]