21405790

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{59}}^1\times {\mathrm{71}}^1\times {\mathrm{73}}^1$

素因数の和:217

約数の個数: 64

約数和(自身を含む): 46033920

約数和(自身を除く): 24628130

約数列:

[1, 2, 5, 7, 10, 14, 35, 59, 70, 71, 73, 118, 142, 146, 295, 355, 365, 413, 497, 511, 590, 710, 730, 826, 994, 1022, 2065, 2485, 2555, 4130, 4189, 4307, 4970, 5110, 5183, 8378, 8614, 10366, 20945, 21535, 25915, 29323, 30149, 36281, 41890, 43070, 51830, 58646, 60298, 72562, 146615, 150745, 181405, 293230, 301490, 305797, 362810, 611594, 1528985, 2140579, 3057970, 4281158, 10702895, 21405790]

約数ペア:

[(1, 21405790), (2, 10702895), (5, 4281158), (7, 3057970), (10, 2140579), (14, 1528985), (35, 611594), (59, 362810), (70, 305797), (71, 301490), (73, 293230), (118, 181405), (142, 150745), (146, 146615), (295, 72562), (355, 60298), (365, 58646), (413, 51830), (497, 43070), (511, 41890), (590, 36281), (710, 30149), (730, 29323), (826, 25915), (994, 21535), (1022, 20945), (2065, 10366), (2485, 8614), (2555, 8378), (4130, 5183), (4189, 5110), (4307, 4970)]