21457956

素因数分解:

$2^2\times 3^1\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{2053}}^1$

素因数の和:2140

約数の個数: 48

約数和(自身を含む): 54751424

約数和(自身を除く): 33293468

約数列:

[1, 2, 3, 4, 6, 12, 13, 26, 39, 52, 67, 78, 134, 156, 201, 268, 402, 804, 871, 1742, 2053, 2613, 3484, 4106, 5226, 6159, 8212, 10452, 12318, 24636, 26689, 53378, 80067, 106756, 137551, 160134, 275102, 320268, 412653, 550204, 825306, 1650612, 1788163, 3576326, 5364489, 7152652, 10728978, 21457956]

約数ペア:

[(1, 21457956), (2, 10728978), (3, 7152652), (4, 5364489), (6, 3576326), (12, 1788163), (13, 1650612), (26, 825306), (39, 550204), (52, 412653), (67, 320268), (78, 275102), (134, 160134), (156, 137551), (201, 106756), (268, 80067), (402, 53378), (804, 26689), (871, 24636), (1742, 12318), (2053, 10452), (2613, 8212), (3484, 6159), (4106, 5226)]