19705180

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{2083}}^1$

素因数の和:2146

約数の個数: 48

約数和(自身を含む): 46214784

約数和(自身を除く): 26509604

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 43, 44, 55, 86, 110, 172, 215, 220, 430, 473, 860, 946, 1892, 2083, 2365, 4166, 4730, 8332, 9460, 10415, 20830, 22913, 41660, 45826, 89569, 91652, 114565, 179138, 229130, 358276, 447845, 458260, 895690, 985259, 1791380, 1970518, 3941036, 4926295, 9852590, 19705180]

約数ペア:

[(1, 19705180), (2, 9852590), (4, 4926295), (5, 3941036), (10, 1970518), (11, 1791380), (20, 985259), (22, 895690), (43, 458260), (44, 447845), (55, 358276), (86, 229130), (110, 179138), (172, 114565), (215, 91652), (220, 89569), (430, 45826), (473, 41660), (860, 22913), (946, 20830), (1892, 10415), (2083, 9460), (2365, 8332), (4166, 4730)]