667760

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{491}}^1$

素因数の和:521

約数の個数: 40

約数和(自身を含む): 1647216

約数和(自身を除く): 979456

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 340, 491, 680, 982, 1360, 1964, 2455, 3928, 4910, 7856, 8347, 9820, 16694, 19640, 33388, 39280, 41735, 66776, 83470, 133552, 166940, 333880, 667760]

約数ペア:

[(1, 667760), (2, 333880), (4, 166940), (5, 133552), (8, 83470), (10, 66776), (16, 41735), (17, 39280), (20, 33388), (34, 19640), (40, 16694), (68, 9820), (80, 8347), (85, 7856), (136, 4910), (170, 3928), (272, 2455), (340, 1964), (491, 1360), (680, 982)]