21953860

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^2\times {\mathrm{653}}^1$

素因数の和:744

約数の個数: 36

約数和(自身を含む): 47327364

約数和(自身を除く): 25373504

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 653, 820, 1306, 1681, 2612, 3265, 3362, 6530, 6724, 8405, 13060, 16810, 26773, 33620, 53546, 107092, 133865, 267730, 535460, 1097693, 2195386, 4390772, 5488465, 10976930, 21953860]

約数ペア:

[(1, 21953860), (2, 10976930), (4, 5488465), (5, 4390772), (10, 2195386), (20, 1097693), (41, 535460), (82, 267730), (164, 133865), (205, 107092), (410, 53546), (653, 33620), (820, 26773), (1306, 16810), (1681, 13060), (2612, 8405), (3265, 6724), (3362, 6530)]