20178711

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{83}}^1\times {\mathrm{227}}^1$

素因数の和:340

約数の個数: 48

約数和(自身を含む): 35852544

約数和(自身を除く): 15673833

約数列:

[1, 3, 7, 9, 17, 21, 51, 63, 83, 119, 153, 227, 249, 357, 581, 681, 747, 1071, 1411, 1589, 1743, 2043, 3859, 4233, 4767, 5229, 9877, 11577, 12699, 14301, 18841, 27013, 29631, 34731, 56523, 81039, 88893, 131887, 169569, 243117, 320297, 395661, 960891, 1186983, 2242079, 2882673, 6726237, 20178711]

約数ペア:

[(1, 20178711), (3, 6726237), (7, 2882673), (9, 2242079), (17, 1186983), (21, 960891), (51, 395661), (63, 320297), (83, 243117), (119, 169569), (153, 131887), (227, 88893), (249, 81039), (357, 56523), (581, 34731), (681, 29631), (747, 27013), (1071, 18841), (1411, 14301), (1589, 12699), (1743, 11577), (2043, 9877), (3859, 5229), (4233, 4767)]