21851240

素因数分解:

$2^3\times 5^1\times {\mathrm{47}}^1\times {\mathrm{59}}^1\times {\mathrm{197}}^1$

素因数の和:314

約数の個数: 64

約数和(自身を含む): 51321600

約数和(自身を除く): 29470360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 47, 59, 94, 118, 188, 197, 235, 236, 295, 376, 394, 470, 472, 590, 788, 940, 985, 1180, 1576, 1880, 1970, 2360, 2773, 3940, 5546, 7880, 9259, 11092, 11623, 13865, 18518, 22184, 23246, 27730, 37036, 46295, 46492, 55460, 58115, 74072, 92590, 92984, 110920, 116230, 185180, 232460, 370360, 464920, 546281, 1092562, 2185124, 2731405, 4370248, 5462810, 10925620, 21851240]

約数ペア:

[(1, 21851240), (2, 10925620), (4, 5462810), (5, 4370248), (8, 2731405), (10, 2185124), (20, 1092562), (40, 546281), (47, 464920), (59, 370360), (94, 232460), (118, 185180), (188, 116230), (197, 110920), (235, 92984), (236, 92590), (295, 74072), (376, 58115), (394, 55460), (470, 46492), (472, 46295), (590, 37036), (788, 27730), (940, 23246), (985, 22184), (1180, 18518), (1576, 13865), (1880, 11623), (1970, 11092), (2360, 9259), (2773, 7880), (3940, 5546)]