20127400

素因数分解:

$2^3\times 5^2\times {\mathrm{157}}^1\times {\mathrm{641}}^1$

素因数の和:814

約数の個数: 48

約数和(自身を含む): 47167740

約数和(自身を除く): 27040340

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 157, 200, 314, 628, 641, 785, 1256, 1282, 1570, 2564, 3140, 3205, 3925, 5128, 6280, 6410, 7850, 12820, 15700, 16025, 25640, 31400, 32050, 64100, 100637, 128200, 201274, 402548, 503185, 805096, 1006370, 2012740, 2515925, 4025480, 5031850, 10063700, 20127400]

約数ペア:

[(1, 20127400), (2, 10063700), (4, 5031850), (5, 4025480), (8, 2515925), (10, 2012740), (20, 1006370), (25, 805096), (40, 503185), (50, 402548), (100, 201274), (157, 128200), (200, 100637), (314, 64100), (628, 32050), (641, 31400), (785, 25640), (1256, 16025), (1282, 15700), (1570, 12820), (2564, 7850), (3140, 6410), (3205, 6280), (3925, 5128)]