20455920

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{28411}}^1$

素因数の和:28430

約数の個数: 60

約数和(自身を含む): 68700216

約数和(自身を除く): 48244296

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 72, 80, 90, 120, 144, 180, 240, 360, 720, 28411, 56822, 85233, 113644, 142055, 170466, 227288, 255699, 284110, 340932, 426165, 454576, 511398, 568220, 681864, 852330, 1022796, 1136440, 1278495, 1363728, 1704660, 2045592, 2272880, 2556990, 3409320, 4091184, 5113980, 6818640, 10227960, 20455920]

約数ペア:

[(1, 20455920), (2, 10227960), (3, 6818640), (4, 5113980), (5, 4091184), (6, 3409320), (8, 2556990), (9, 2272880), (10, 2045592), (12, 1704660), (15, 1363728), (16, 1278495), (18, 1136440), (20, 1022796), (24, 852330), (30, 681864), (36, 568220), (40, 511398), (45, 454576), (48, 426165), (60, 340932), (72, 284110), (80, 255699), (90, 227288), (120, 170466), (144, 142055), (180, 113644), (240, 85233), (360, 56822), (720, 28411)]