20918408

素因数分解:

$2^3\times 7^1\times {\mathrm{23}}^1\times {\mathrm{109}}^1\times {\mathrm{149}}^1$

素因数の和:294

約数の個数: 64

約数和(自身を含む): 47520000

約数和(自身を除く): 26601592

約数列:

[1, 2, 4, 7, 8, 14, 23, 28, 46, 56, 92, 109, 149, 161, 184, 218, 298, 322, 436, 596, 644, 763, 872, 1043, 1192, 1288, 1526, 2086, 2507, 3052, 3427, 4172, 5014, 6104, 6854, 8344, 10028, 13708, 16241, 17549, 20056, 23989, 27416, 32482, 35098, 47978, 64964, 70196, 95956, 113687, 129928, 140392, 191912, 227374, 373543, 454748, 747086, 909496, 1494172, 2614801, 2988344, 5229602, 10459204, 20918408]

約数ペア:

[(1, 20918408), (2, 10459204), (4, 5229602), (7, 2988344), (8, 2614801), (14, 1494172), (23, 909496), (28, 747086), (46, 454748), (56, 373543), (92, 227374), (109, 191912), (149, 140392), (161, 129928), (184, 113687), (218, 95956), (298, 70196), (322, 64964), (436, 47978), (596, 35098), (644, 32482), (763, 27416), (872, 23989), (1043, 20056), (1192, 17549), (1288, 16241), (1526, 13708), (2086, 10028), (2507, 8344), (3052, 6854), (3427, 6104), (4172, 5014)]