21243285

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{3967}}^1$

素因数の和:4002

約数の個数: 48

約数和(自身を含む): 44568576

約数和(自身を除く): 23325291

約数列:

[1, 3, 5, 7, 9, 15, 17, 21, 35, 45, 51, 63, 85, 105, 119, 153, 255, 315, 357, 595, 765, 1071, 1785, 3967, 5355, 11901, 19835, 27769, 35703, 59505, 67439, 83307, 138845, 178515, 202317, 249921, 337195, 416535, 472073, 606951, 1011585, 1249605, 1416219, 2360365, 3034755, 4248657, 7081095, 21243285]

約数ペア:

[(1, 21243285), (3, 7081095), (5, 4248657), (7, 3034755), (9, 2360365), (15, 1416219), (17, 1249605), (21, 1011585), (35, 606951), (45, 472073), (51, 416535), (63, 337195), (85, 249921), (105, 202317), (119, 178515), (153, 138845), (255, 83307), (315, 67439), (357, 59505), (595, 35703), (765, 27769), (1071, 19835), (1785, 11901), (3967, 5355)]