18867475

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{157}}^1$

素因数の和:220

約数の個数: 48

約数和(自身を含む): 28212480

約数和(自身を除く): 9345005

約数列:

[1, 5, 11, 19, 23, 25, 55, 95, 115, 157, 209, 253, 275, 437, 475, 575, 785, 1045, 1265, 1727, 2185, 2983, 3611, 3925, 4807, 5225, 6325, 8635, 10925, 14915, 18055, 24035, 32813, 39721, 43175, 68609, 74575, 90275, 120175, 164065, 198605, 343045, 754699, 820325, 993025, 1715225, 3773495, 18867475]

約数ペア:

[(1, 18867475), (5, 3773495), (11, 1715225), (19, 993025), (23, 820325), (25, 754699), (55, 343045), (95, 198605), (115, 164065), (157, 120175), (209, 90275), (253, 74575), (275, 68609), (437, 43175), (475, 39721), (575, 32813), (785, 24035), (1045, 18055), (1265, 14915), (1727, 10925), (2185, 8635), (2983, 6325), (3611, 5225), (3925, 4807)]