18921680

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{13913}}^1$

素因数の和:13943

約数の個数: 40

約数和(自身を含む): 46584072

約数和(自身を除く): 27662392

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 340, 680, 1360, 13913, 27826, 55652, 69565, 111304, 139130, 222608, 236521, 278260, 473042, 556520, 946084, 1113040, 1182605, 1892168, 2365210, 3784336, 4730420, 9460840, 18921680]

約数ペア:

[(1, 18921680), (2, 9460840), (4, 4730420), (5, 3784336), (8, 2365210), (10, 1892168), (16, 1182605), (17, 1113040), (20, 946084), (34, 556520), (40, 473042), (68, 278260), (80, 236521), (85, 222608), (136, 139130), (170, 111304), (272, 69565), (340, 55652), (680, 27826), (1360, 13913)]