20565280

素因数分解:

$2^5\times 5^1\times {\mathrm{79}}^1\times {\mathrm{1627}}^1$

素因数の和:1721

約数の個数: 48

約数和(自身を含む): 49230720

約数和(自身を除く): 28665440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 79, 80, 158, 160, 316, 395, 632, 790, 1264, 1580, 1627, 2528, 3160, 3254, 6320, 6508, 8135, 12640, 13016, 16270, 26032, 32540, 52064, 65080, 128533, 130160, 257066, 260320, 514132, 642665, 1028264, 1285330, 2056528, 2570660, 4113056, 5141320, 10282640, 20565280]

約数ペア:

[(1, 20565280), (2, 10282640), (4, 5141320), (5, 4113056), (8, 2570660), (10, 2056528), (16, 1285330), (20, 1028264), (32, 642665), (40, 514132), (79, 260320), (80, 257066), (158, 130160), (160, 128533), (316, 65080), (395, 52064), (632, 32540), (790, 26032), (1264, 16270), (1580, 13016), (1627, 12640), (2528, 8135), (3160, 6508), (3254, 6320)]