19894760

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^2\times {\mathrm{1721}}^1$

素因数の和:1766

約数の個数: 48

約数和(自身を含む): 47578860

約数和(自身を除く): 27684100

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 289, 340, 578, 680, 1156, 1445, 1721, 2312, 2890, 3442, 5780, 6884, 8605, 11560, 13768, 17210, 29257, 34420, 58514, 68840, 117028, 146285, 234056, 292570, 497369, 585140, 994738, 1170280, 1989476, 2486845, 3978952, 4973690, 9947380, 19894760]

約数ペア:

[(1, 19894760), (2, 9947380), (4, 4973690), (5, 3978952), (8, 2486845), (10, 1989476), (17, 1170280), (20, 994738), (34, 585140), (40, 497369), (68, 292570), (85, 234056), (136, 146285), (170, 117028), (289, 68840), (340, 58514), (578, 34420), (680, 29257), (1156, 17210), (1445, 13768), (1721, 11560), (2312, 8605), (2890, 6884), (3442, 5780)]