21989540

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{1223}}^1$

素因数の和:1292

約数の個数: 48

約数和(自身を含む): 49351680

約数和(自身を除く): 27362140

約数列:

[1, 2, 4, 5, 10, 20, 29, 31, 58, 62, 116, 124, 145, 155, 290, 310, 580, 620, 899, 1223, 1798, 2446, 3596, 4495, 4892, 6115, 8990, 12230, 17980, 24460, 35467, 37913, 70934, 75826, 141868, 151652, 177335, 189565, 354670, 379130, 709340, 758260, 1099477, 2198954, 4397908, 5497385, 10994770, 21989540]

約数ペア:

[(1, 21989540), (2, 10994770), (4, 5497385), (5, 4397908), (10, 2198954), (20, 1099477), (29, 758260), (31, 709340), (58, 379130), (62, 354670), (116, 189565), (124, 177335), (145, 151652), (155, 141868), (290, 75826), (310, 70934), (580, 37913), (620, 35467), (899, 24460), (1223, 17980), (1798, 12230), (2446, 8990), (3596, 6115), (4495, 4892)]