81891940

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{10861}}^1$

素因数の和:10912

約数の個数: 48

約数和(自身を含む): 191605680

約数和(自身を除く): 109713740

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 29, 52, 58, 65, 116, 130, 145, 260, 290, 377, 580, 754, 1508, 1885, 3770, 7540, 10861, 21722, 43444, 54305, 108610, 141193, 217220, 282386, 314969, 564772, 629938, 705965, 1259876, 1411930, 1574845, 2823860, 3149690, 4094597, 6299380, 8189194, 16378388, 20472985, 40945970, 81891940]

約数ペア:

[(1, 81891940), (2, 40945970), (4, 20472985), (5, 16378388), (10, 8189194), (13, 6299380), (20, 4094597), (26, 3149690), (29, 2823860), (52, 1574845), (58, 1411930), (65, 1259876), (116, 705965), (130, 629938), (145, 564772), (260, 314969), (290, 282386), (377, 217220), (580, 141193), (754, 108610), (1508, 54305), (1885, 43444), (3770, 21722), (7540, 10861)]