18009880

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{131}}^1\times {\mathrm{491}}^1$

素因数の和:640

約数の個数: 64

約数和(自身を含む): 46759680

約数和(自身を除く): 28749800

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 131, 140, 262, 280, 491, 524, 655, 917, 982, 1048, 1310, 1834, 1964, 2455, 2620, 3437, 3668, 3928, 4585, 4910, 5240, 6874, 7336, 9170, 9820, 13748, 17185, 18340, 19640, 27496, 34370, 36680, 64321, 68740, 128642, 137480, 257284, 321605, 450247, 514568, 643210, 900494, 1286420, 1800988, 2251235, 2572840, 3601976, 4502470, 9004940, 18009880]

約数ペア:

[(1, 18009880), (2, 9004940), (4, 4502470), (5, 3601976), (7, 2572840), (8, 2251235), (10, 1800988), (14, 1286420), (20, 900494), (28, 643210), (35, 514568), (40, 450247), (56, 321605), (70, 257284), (131, 137480), (140, 128642), (262, 68740), (280, 64321), (491, 36680), (524, 34370), (655, 27496), (917, 19640), (982, 18340), (1048, 17185), (1310, 13748), (1834, 9820), (1964, 9170), (2455, 7336), (2620, 6874), (3437, 5240), (3668, 4910), (3928, 4585)]