21075160

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{12253}}^1$

素因数の和:12307

約数の個数: 32

約数和(自身を含む): 48525840

約数和(自身を除く): 27450680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 12253, 24506, 49012, 61265, 98024, 122530, 245060, 490120, 526879, 1053758, 2107516, 2634395, 4215032, 5268790, 10537580, 21075160]

約数ペア:

[(1, 21075160), (2, 10537580), (4, 5268790), (5, 4215032), (8, 2634395), (10, 2107516), (20, 1053758), (40, 526879), (43, 490120), (86, 245060), (172, 122530), (215, 98024), (344, 61265), (430, 49012), (860, 24506), (1720, 12253)]