20670215

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{97}}^1\times {\mathrm{109}}^1$

素因数の和:251

約数の個数: 32

約数和(自身を含む): 27941760

約数和(自身を除く): 7271545

約数列:

[1, 5, 17, 23, 85, 97, 109, 115, 391, 485, 545, 1649, 1853, 1955, 2231, 2507, 8245, 9265, 10573, 11155, 12535, 37927, 42619, 52865, 179741, 189635, 213095, 243179, 898705, 1215895, 4134043, 20670215]

約数ペア:

[(1, 20670215), (5, 4134043), (17, 1215895), (23, 898705), (85, 243179), (97, 213095), (109, 189635), (115, 179741), (391, 52865), (485, 42619), (545, 37927), (1649, 12535), (1853, 11155), (1955, 10573), (2231, 9265), (2507, 8245)]