19915696775

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{97423}}^1$

素因数の和:97500

約数の個数: 48

約数和(自身を含む): 28920898944

約数和(自身を除く): 9005202169

約数列:

[1, 5, 13, 17, 25, 37, 65, 85, 185, 221, 325, 425, 481, 629, 925, 1105, 2405, 3145, 5525, 8177, 12025, 15725, 40885, 97423, 204425, 487115, 1266499, 1656191, 2435575, 3604651, 6332495, 8280955, 18023255, 21530483, 31662475, 41404775, 46860463, 61279067, 90116275, 107652415, 234302315, 306395335, 538262075, 796627871, 1171511575, 1531976675, 3983139355, 19915696775]

約数ペア:

[(1, 19915696775), (5, 3983139355), (13, 1531976675), (17, 1171511575), (25, 796627871), (37, 538262075), (65, 306395335), (85, 234302315), (185, 107652415), (221, 90116275), (325, 61279067), (425, 46860463), (481, 41404775), (629, 31662475), (925, 21530483), (1105, 18023255), (2405, 8280955), (3145, 6332495), (5525, 3604651), (8177, 2435575), (12025, 1656191), (15725, 1266499), (40885, 487115), (97423, 204425)]