18867280

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{13873}}^1$

素因数の和:13903

約数の個数: 40

約数和(自身を含む): 46450152

約数和(自身を除く): 27582872

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 340, 680, 1360, 13873, 27746, 55492, 69365, 110984, 138730, 221968, 235841, 277460, 471682, 554920, 943364, 1109840, 1179205, 1886728, 2358410, 3773456, 4716820, 9433640, 18867280]

約数ペア:

[(1, 18867280), (2, 9433640), (4, 4716820), (5, 3773456), (8, 2358410), (10, 1886728), (16, 1179205), (17, 1109840), (20, 943364), (34, 554920), (40, 471682), (68, 277460), (80, 235841), (85, 221968), (136, 138730), (170, 110984), (272, 69365), (340, 55492), (680, 27746), (1360, 13873)]