21331875

素因数分解:

$3^1\times 5^4\times {\mathrm{31}}^1\times {\mathrm{367}}^1$

素因数の和:421

約数の個数: 40

約数和(自身を含む): 36788224

約数和(自身を除く): 15456349

約数列:

[1, 3, 5, 15, 25, 31, 75, 93, 125, 155, 367, 375, 465, 625, 775, 1101, 1835, 1875, 2325, 3875, 5505, 9175, 11377, 11625, 19375, 27525, 34131, 45875, 56885, 58125, 137625, 170655, 229375, 284425, 688125, 853275, 1422125, 4266375, 7110625, 21331875]

約数ペア:

[(1, 21331875), (3, 7110625), (5, 4266375), (15, 1422125), (25, 853275), (31, 688125), (75, 284425), (93, 229375), (125, 170655), (155, 137625), (367, 58125), (375, 56885), (465, 45875), (625, 34131), (775, 27525), (1101, 19375), (1835, 11625), (1875, 11377), (2325, 9175), (3875, 5505)]