21804475

素因数分解:

$5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{241}}^1$

素因数の和:316

約数の個数: 48

約数和(自身を含む): 34569216

約数和(自身を除く): 12764741

約数列:

[1, 5, 7, 11, 25, 35, 47, 55, 77, 175, 235, 241, 275, 329, 385, 517, 1175, 1205, 1645, 1687, 1925, 2585, 2651, 3619, 6025, 8225, 8435, 11327, 12925, 13255, 18095, 18557, 42175, 56635, 66275, 79289, 90475, 92785, 124597, 283175, 396445, 463925, 622985, 872179, 1982225, 3114925, 4360895, 21804475]

約数ペア:

[(1, 21804475), (5, 4360895), (7, 3114925), (11, 1982225), (25, 872179), (35, 622985), (47, 463925), (55, 396445), (77, 283175), (175, 124597), (235, 92785), (241, 90475), (275, 79289), (329, 66275), (385, 56635), (517, 42175), (1175, 18557), (1205, 18095), (1645, 13255), (1687, 12925), (1925, 11327), (2585, 8435), (2651, 8225), (3619, 6025)]