64242440

素因数分解:

$2^3\times 5^1\times {\mathrm{491}}^1\times {\mathrm{3271}}^1$

素因数の和:3773

約数の個数: 32

約数和(自身を含む): 144884160

約数和(自身を除く): 80641720

約数列:

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

約数ペア:

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