21357525

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{2393}}^1$

素因数の和:2430

約数の個数: 48

約数和(自身を含む): 42747264

約数和(自身を除く): 21389739

約数列:

[1, 3, 5, 7, 15, 17, 21, 25, 35, 51, 75, 85, 105, 119, 175, 255, 357, 425, 525, 595, 1275, 1785, 2393, 2975, 7179, 8925, 11965, 16751, 35895, 40681, 50253, 59825, 83755, 122043, 179475, 203405, 251265, 284767, 418775, 610215, 854301, 1017025, 1256325, 1423835, 3051075, 4271505, 7119175, 21357525]

約数ペア:

[(1, 21357525), (3, 7119175), (5, 4271505), (7, 3051075), (15, 1423835), (17, 1256325), (21, 1017025), (25, 854301), (35, 610215), (51, 418775), (75, 284767), (85, 251265), (105, 203405), (119, 179475), (175, 122043), (255, 83755), (357, 59825), (425, 50253), (525, 40681), (595, 35895), (1275, 16751), (1785, 11965), (2393, 8925), (2975, 7179)]