128484880

素因数分解:

$2^4\times 5^1\times {\mathrm{491}}^1\times {\mathrm{3271}}^1$

素因数の和:3775

約数の個数: 40

約数和(自身を含む): 299427264

約数和(自身を除く): 170942384

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 491, 982, 1964, 2455, 3271, 3928, 4910, 6542, 7856, 9820, 13084, 16355, 19640, 26168, 32710, 39280, 52336, 65420, 130840, 261680, 1606061, 3212122, 6424244, 8030305, 12848488, 16060610, 25696976, 32121220, 64242440, 128484880]

約数ペア:

[(1, 128484880), (2, 64242440), (4, 32121220), (5, 25696976), (8, 16060610), (10, 12848488), (16, 8030305), (20, 6424244), (40, 3212122), (80, 1606061), (491, 261680), (982, 130840), (1964, 65420), (2455, 52336), (3271, 39280), (3928, 32710), (4910, 26168), (6542, 19640), (7856, 16355), (9820, 13084)]