18660560

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{13721}}^1$

素因数の和:13751

約数の個数: 40

約数和(自身を含む): 45941256

約数和(自身を除く): 27280696

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 340, 680, 1360, 13721, 27442, 54884, 68605, 109768, 137210, 219536, 233257, 274420, 466514, 548840, 933028, 1097680, 1166285, 1866056, 2332570, 3732112, 4665140, 9330280, 18660560]

約数ペア:

[(1, 18660560), (2, 9330280), (4, 4665140), (5, 3732112), (8, 2332570), (10, 1866056), (16, 1166285), (17, 1097680), (20, 933028), (34, 548840), (40, 466514), (68, 274420), (80, 233257), (85, 219536), (136, 137210), (170, 109768), (272, 68605), (340, 54884), (680, 27442), (1360, 13721)]