21216748

素因数分解:

$2^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{29}}^2\times {\mathrm{53}}^1$

素因数の和:139

約数の個数: 72

約数和(自身を含む): 47410272

約数和(自身を除く): 26193524

約数列:

[1, 2, 4, 7, 14, 17, 28, 29, 34, 53, 58, 68, 106, 116, 119, 203, 212, 238, 371, 406, 476, 493, 742, 812, 841, 901, 986, 1484, 1537, 1682, 1802, 1972, 3074, 3364, 3451, 3604, 5887, 6148, 6307, 6902, 10759, 11774, 12614, 13804, 14297, 21518, 23548, 25228, 26129, 28594, 43036, 44573, 52258, 57188, 89146, 100079, 104516, 178292, 182903, 200158, 312011, 365806, 400316, 624022, 731612, 757741, 1248044, 1515482, 3030964, 5304187, 10608374, 21216748]

約数ペア:

[(1, 21216748), (2, 10608374), (4, 5304187), (7, 3030964), (14, 1515482), (17, 1248044), (28, 757741), (29, 731612), (34, 624022), (53, 400316), (58, 365806), (68, 312011), (106, 200158), (116, 182903), (119, 178292), (203, 104516), (212, 100079), (238, 89146), (371, 57188), (406, 52258), (476, 44573), (493, 43036), (742, 28594), (812, 26129), (841, 25228), (901, 23548), (986, 21518), (1484, 14297), (1537, 13804), (1682, 12614), (1802, 11774), (1972, 10759), (3074, 6902), (3364, 6307), (3451, 6148), (3604, 5887)]