21788195

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{983}}^1$

素因数の和:1043

約数の個数: 32

約数和(自身を含む): 31739904

約数和(自身を除く): 9951709

約数列:

[1, 5, 11, 13, 31, 55, 65, 143, 155, 341, 403, 715, 983, 1705, 2015, 4433, 4915, 10813, 12779, 22165, 30473, 54065, 63895, 140569, 152365, 335203, 396149, 702845, 1676015, 1980745, 4357639, 21788195]

約数ペア:

[(1, 21788195), (5, 4357639), (11, 1980745), (13, 1676015), (31, 702845), (55, 396149), (65, 335203), (143, 152365), (155, 140569), (341, 63895), (403, 54065), (715, 30473), (983, 22165), (1705, 12779), (2015, 10813), (4433, 4915)]