21961240

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{1913}}^1$

素因数の和:1972

約数の個数: 64

約数和(自身を含む): 57879360

約数和(自身を除く): 35918120

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 41, 56, 70, 82, 140, 164, 205, 280, 287, 328, 410, 574, 820, 1148, 1435, 1640, 1913, 2296, 2870, 3826, 5740, 7652, 9565, 11480, 13391, 15304, 19130, 26782, 38260, 53564, 66955, 76520, 78433, 107128, 133910, 156866, 267820, 313732, 392165, 535640, 549031, 627464, 784330, 1098062, 1568660, 2196124, 2745155, 3137320, 4392248, 5490310, 10980620, 21961240]

約数ペア:

[(1, 21961240), (2, 10980620), (4, 5490310), (5, 4392248), (7, 3137320), (8, 2745155), (10, 2196124), (14, 1568660), (20, 1098062), (28, 784330), (35, 627464), (40, 549031), (41, 535640), (56, 392165), (70, 313732), (82, 267820), (140, 156866), (164, 133910), (205, 107128), (280, 78433), (287, 76520), (328, 66955), (410, 53564), (574, 38260), (820, 26782), (1148, 19130), (1435, 15304), (1640, 13391), (1913, 11480), (2296, 9565), (2870, 7652), (3826, 5740)]