81931460

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{181}}^1\times {\mathrm{1741}}^1$

素因数の和:1944

約数の個数: 48

約数和(自身を含む): 186421872

約数和(自身を除く): 104490412

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 181, 260, 362, 724, 905, 1741, 1810, 2353, 3482, 3620, 4706, 6964, 8705, 9412, 11765, 17410, 22633, 23530, 34820, 45266, 47060, 90532, 113165, 226330, 315121, 452660, 630242, 1260484, 1575605, 3151210, 4096573, 6302420, 8193146, 16386292, 20482865, 40965730, 81931460]

約数ペア:

[(1, 81931460), (2, 40965730), (4, 20482865), (5, 16386292), (10, 8193146), (13, 6302420), (20, 4096573), (26, 3151210), (52, 1575605), (65, 1260484), (130, 630242), (181, 452660), (260, 315121), (362, 226330), (724, 113165), (905, 90532), (1741, 47060), (1810, 45266), (2353, 34820), (3482, 23530), (3620, 22633), (4706, 17410), (6964, 11765), (8705, 9412)]