20997960

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{233}}^1\times {\mathrm{751}}^1$

素因数の和:998

約数の個数: 64

約数和(自身を含む): 63348480

約数和(自身を除く): 42350520

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 233, 466, 699, 751, 932, 1165, 1398, 1502, 1864, 2253, 2330, 2796, 3004, 3495, 3755, 4506, 4660, 5592, 6008, 6990, 7510, 9012, 9320, 11265, 13980, 15020, 18024, 22530, 27960, 30040, 45060, 90120, 174983, 349966, 524949, 699932, 874915, 1049898, 1399864, 1749830, 2099796, 2624745, 3499660, 4199592, 5249490, 6999320, 10498980, 20997960]

約数ペア:

[(1, 20997960), (2, 10498980), (3, 6999320), (4, 5249490), (5, 4199592), (6, 3499660), (8, 2624745), (10, 2099796), (12, 1749830), (15, 1399864), (20, 1049898), (24, 874915), (30, 699932), (40, 524949), (60, 349966), (120, 174983), (233, 90120), (466, 45060), (699, 30040), (751, 27960), (932, 22530), (1165, 18024), (1398, 15020), (1502, 13980), (1864, 11265), (2253, 9320), (2330, 9012), (2796, 7510), (3004, 6990), (3495, 6008), (3755, 5592), (4506, 4660)]