21000891235

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{37}}^2\times {\mathrm{113}}^1\times {\mathrm{1429}}^1$

素因数の和:1640

約数の個数: 48

約数和(自身を含む): 27524296800

約数和(自身を除く): 6523405565

約数列:

[1, 5, 19, 37, 95, 113, 185, 565, 703, 1369, 1429, 2147, 3515, 4181, 6845, 7145, 10735, 20905, 26011, 27151, 52873, 79439, 130055, 135755, 154697, 161477, 264365, 397195, 773485, 807385, 1004587, 1956301, 2939243, 3068063, 5022935, 5974649, 9781505, 14696215, 15340315, 29873245, 37169719, 113518331, 185848595, 221062013, 567591655, 1105310065, 4200178247, 21000891235]

約数ペア:

[(1, 21000891235), (5, 4200178247), (19, 1105310065), (37, 567591655), (95, 221062013), (113, 185848595), (185, 113518331), (565, 37169719), (703, 29873245), (1369, 15340315), (1429, 14696215), (2147, 9781505), (3515, 5974649), (4181, 5022935), (6845, 3068063), (7145, 2939243), (10735, 1956301), (20905, 1004587), (26011, 807385), (27151, 773485), (52873, 397195), (79439, 264365), (130055, 161477), (135755, 154697)]