21167825

素因数分解:

$5^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{97}}^1$

素因数の和:186

約数の個数: 48

約数和(自身を含む): 32081280

約数和(自身を除く): 10913455

約数列:

[1, 5, 7, 25, 29, 35, 43, 97, 145, 175, 203, 215, 301, 485, 679, 725, 1015, 1075, 1247, 1505, 2425, 2813, 3395, 4171, 5075, 6235, 7525, 8729, 14065, 16975, 19691, 20855, 29197, 31175, 43645, 70325, 98455, 104275, 120959, 145985, 218225, 492275, 604795, 729925, 846713, 3023975, 4233565, 21167825]

約数ペア:

[(1, 21167825), (5, 4233565), (7, 3023975), (25, 846713), (29, 729925), (35, 604795), (43, 492275), (97, 218225), (145, 145985), (175, 120959), (203, 104275), (215, 98455), (301, 70325), (485, 43645), (679, 31175), (725, 29197), (1015, 20855), (1075, 19691), (1247, 16975), (1505, 14065), (2425, 8729), (2813, 7525), (3395, 6235), (4171, 5075)]