64831640

素因数分解:

$2^3\times 5^1\times {\mathrm{491}}^1\times {\mathrm{3301}}^1$

素因数の和:3803

約数の個数: 32

約数和(自身を含む): 146212560

約数和(自身を除く): 81380920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 491, 982, 1964, 2455, 3301, 3928, 4910, 6602, 9820, 13204, 16505, 19640, 26408, 33010, 66020, 132040, 1620791, 3241582, 6483164, 8103955, 12966328, 16207910, 32415820, 64831640]

約数ペア:

[(1, 64831640), (2, 32415820), (4, 16207910), (5, 12966328), (8, 8103955), (10, 6483164), (20, 3241582), (40, 1620791), (491, 132040), (982, 66020), (1964, 33010), (2455, 26408), (3301, 19640), (3928, 16505), (4910, 13204), (6602, 9820)]