20540840

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{83}}^1\times {\mathrm{269}}^1$

素因数の和:386

約数の個数: 64

約数和(自身を含む): 48988800

約数和(自身を除く): 28447960

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 40, 46, 83, 92, 115, 166, 184, 230, 269, 332, 415, 460, 538, 664, 830, 920, 1076, 1345, 1660, 1909, 2152, 2690, 3320, 3818, 5380, 6187, 7636, 9545, 10760, 12374, 15272, 19090, 22327, 24748, 30935, 38180, 44654, 49496, 61870, 76360, 89308, 111635, 123740, 178616, 223270, 247480, 446540, 513521, 893080, 1027042, 2054084, 2567605, 4108168, 5135210, 10270420, 20540840]

約数ペア:

[(1, 20540840), (2, 10270420), (4, 5135210), (5, 4108168), (8, 2567605), (10, 2054084), (20, 1027042), (23, 893080), (40, 513521), (46, 446540), (83, 247480), (92, 223270), (115, 178616), (166, 123740), (184, 111635), (230, 89308), (269, 76360), (332, 61870), (415, 49496), (460, 44654), (538, 38180), (664, 30935), (830, 24748), (920, 22327), (1076, 19090), (1345, 15272), (1660, 12374), (1909, 10760), (2152, 9545), (2690, 7636), (3320, 6187), (3818, 5380)]