81662980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{41}}^2\times {\mathrm{347}}^1$

素因数の和:445

約数の個数: 72

約数和(自身を含む): 201466944

約数和(自身を除く): 119803964

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 41, 70, 82, 140, 164, 205, 287, 347, 410, 574, 694, 820, 1148, 1388, 1435, 1681, 1735, 2429, 2870, 3362, 3470, 4858, 5740, 6724, 6940, 8405, 9716, 11767, 12145, 14227, 16810, 23534, 24290, 28454, 33620, 47068, 48580, 56908, 58835, 71135, 99589, 117670, 142270, 199178, 235340, 284540, 398356, 497945, 583307, 995890, 1166614, 1991780, 2333228, 2916535, 4083149, 5833070, 8166298, 11666140, 16332596, 20415745, 40831490, 81662980]

約数ペア:

[(1, 81662980), (2, 40831490), (4, 20415745), (5, 16332596), (7, 11666140), (10, 8166298), (14, 5833070), (20, 4083149), (28, 2916535), (35, 2333228), (41, 1991780), (70, 1166614), (82, 995890), (140, 583307), (164, 497945), (205, 398356), (287, 284540), (347, 235340), (410, 199178), (574, 142270), (694, 117670), (820, 99589), (1148, 71135), (1388, 58835), (1435, 56908), (1681, 48580), (1735, 47068), (2429, 33620), (2870, 28454), (3362, 24290), (3470, 23534), (4858, 16810), (5740, 14227), (6724, 12145), (6940, 11767), (8405, 9716)]