21906400

素因数分解:

$2^5\times 5^2\times {\mathrm{139}}^1\times {\mathrm{197}}^1$

素因数の和:356

約数の個数: 72

約数和(自身を含む): 54137160

約数和(自身を除く): 32230760

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 139, 160, 197, 200, 278, 394, 400, 556, 695, 788, 800, 985, 1112, 1390, 1576, 1970, 2224, 2780, 3152, 3475, 3940, 4448, 4925, 5560, 6304, 6950, 7880, 9850, 11120, 13900, 15760, 19700, 22240, 27383, 27800, 31520, 39400, 54766, 55600, 78800, 109532, 111200, 136915, 157600, 219064, 273830, 438128, 547660, 684575, 876256, 1095320, 1369150, 2190640, 2738300, 4381280, 5476600, 10953200, 21906400]

約数ペア:

[(1, 21906400), (2, 10953200), (4, 5476600), (5, 4381280), (8, 2738300), (10, 2190640), (16, 1369150), (20, 1095320), (25, 876256), (32, 684575), (40, 547660), (50, 438128), (80, 273830), (100, 219064), (139, 157600), (160, 136915), (197, 111200), (200, 109532), (278, 78800), (394, 55600), (400, 54766), (556, 39400), (695, 31520), (788, 27800), (800, 27383), (985, 22240), (1112, 19700), (1390, 15760), (1576, 13900), (1970, 11120), (2224, 9850), (2780, 7880), (3152, 6950), (3475, 6304), (3940, 5560), (4448, 4925)]