81492580

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{379}}^1\times {\mathrm{827}}^1$

素因数の和:1228

約数の個数: 48

約数和(自身を含む): 185008320

約数和(自身を除く): 103515740

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 379, 758, 827, 1516, 1654, 1895, 3308, 3790, 4135, 4927, 7580, 8270, 9854, 10751, 16540, 19708, 21502, 24635, 43004, 49270, 53755, 98540, 107510, 215020, 313433, 626866, 1253732, 1567165, 3134330, 4074629, 6268660, 8149258, 16298516, 20373145, 40746290, 81492580]

約数ペア:

[(1, 81492580), (2, 40746290), (4, 20373145), (5, 16298516), (10, 8149258), (13, 6268660), (20, 4074629), (26, 3134330), (52, 1567165), (65, 1253732), (130, 626866), (260, 313433), (379, 215020), (758, 107510), (827, 98540), (1516, 53755), (1654, 49270), (1895, 43004), (3308, 24635), (3790, 21502), (4135, 19708), (4927, 16540), (7580, 10751), (8270, 9854)]