21172240

素因数分解:

$2^4\times 5^1\times {\mathrm{383}}^1\times {\mathrm{691}}^1$

素因数の和:1087

約数の個数: 40

約数和(自身を含む): 49425408

約数和(自身を除く): 28253168

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 383, 691, 766, 1382, 1532, 1915, 2764, 3064, 3455, 3830, 5528, 6128, 6910, 7660, 11056, 13820, 15320, 27640, 30640, 55280, 264653, 529306, 1058612, 1323265, 2117224, 2646530, 4234448, 5293060, 10586120, 21172240]

約数ペア:

[(1, 21172240), (2, 10586120), (4, 5293060), (5, 4234448), (8, 2646530), (10, 2117224), (16, 1323265), (20, 1058612), (40, 529306), (80, 264653), (383, 55280), (691, 30640), (766, 27640), (1382, 15320), (1532, 13820), (1915, 11056), (2764, 7660), (3064, 6910), (3455, 6128), (3830, 5528)]