21920900

素因数分解:

$2^2\times 5^2\times {\mathrm{223}}^1\times {\mathrm{983}}^1$

素因数の和:1220

約数の個数: 36

約数和(自身を含む): 47830272

約数和(自身を除く): 25909372

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 223, 446, 892, 983, 1115, 1966, 2230, 3932, 4460, 4915, 5575, 9830, 11150, 19660, 22300, 24575, 49150, 98300, 219209, 438418, 876836, 1096045, 2192090, 4384180, 5480225, 10960450, 21920900]

約数ペア:

[(1, 21920900), (2, 10960450), (4, 5480225), (5, 4384180), (10, 2192090), (20, 1096045), (25, 876836), (50, 438418), (100, 219209), (223, 98300), (446, 49150), (892, 24575), (983, 22300), (1115, 19660), (1966, 11150), (2230, 9830), (3932, 5575), (4460, 4915)]