21491960

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{76757}}^1$

素因数の和:76775

約数の個数: 32

約数和(自身を含む): 55265760

約数和(自身を除く): 33773800

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 76757, 153514, 307028, 383785, 537299, 614056, 767570, 1074598, 1535140, 2149196, 2686495, 3070280, 4298392, 5372990, 10745980, 21491960]

約数ペア:

[(1, 21491960), (2, 10745980), (4, 5372990), (5, 4298392), (7, 3070280), (8, 2686495), (10, 2149196), (14, 1535140), (20, 1074598), (28, 767570), (35, 614056), (40, 537299), (56, 383785), (70, 307028), (140, 153514), (280, 76757)]