21511325

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{179}}^1$

素因数の和:242

約数の個数: 48

約数和(自身を含む): 32140800

約数和(自身を除く): 10629475

約数列:

[1, 5, 11, 19, 23, 25, 55, 95, 115, 179, 209, 253, 275, 437, 475, 575, 895, 1045, 1265, 1969, 2185, 3401, 4117, 4475, 4807, 5225, 6325, 9845, 10925, 17005, 20585, 24035, 37411, 45287, 49225, 78223, 85025, 102925, 120175, 187055, 226435, 391115, 860453, 935275, 1132175, 1955575, 4302265, 21511325]

約数ペア:

[(1, 21511325), (5, 4302265), (11, 1955575), (19, 1132175), (23, 935275), (25, 860453), (55, 391115), (95, 226435), (115, 187055), (179, 120175), (209, 102925), (253, 85025), (275, 78223), (437, 49225), (475, 45287), (575, 37411), (895, 24035), (1045, 20585), (1265, 17005), (1969, 10925), (2185, 9845), (3401, 6325), (4117, 5225), (4475, 4807)]