128656840

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{401}}^1\times {\mathrm{617}}^1$

素因数の和:1042

約数の個数: 64

約数和(自身を含む): 313029360

約数和(自身を除く): 184372520

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 401, 520, 617, 802, 1234, 1604, 2005, 2468, 3085, 3208, 4010, 4936, 5213, 6170, 8020, 8021, 10426, 12340, 16040, 16042, 20852, 24680, 26065, 32084, 40105, 41704, 52130, 64168, 80210, 104260, 160420, 208520, 247417, 320840, 494834, 989668, 1237085, 1979336, 2474170, 3216421, 4948340, 6432842, 9896680, 12865684, 16082105, 25731368, 32164210, 64328420, 128656840]

約数ペア:

[(1, 128656840), (2, 64328420), (4, 32164210), (5, 25731368), (8, 16082105), (10, 12865684), (13, 9896680), (20, 6432842), (26, 4948340), (40, 3216421), (52, 2474170), (65, 1979336), (104, 1237085), (130, 989668), (260, 494834), (401, 320840), (520, 247417), (617, 208520), (802, 160420), (1234, 104260), (1604, 80210), (2005, 64168), (2468, 52130), (3085, 41704), (3208, 40105), (4010, 32084), (4936, 26065), (5213, 24680), (6170, 20852), (8020, 16042), (8021, 16040), (10426, 12340)]