20563125

素因数分解:

$3^1\times 5^4\times {\mathrm{11}}^1\times {\mathrm{997}}^1$

素因数の和:1031

約数の個数: 40

約数和(自身を含む): 37413024

約数和(自身を除く): 16849899

約数列:

[1, 3, 5, 11, 15, 25, 33, 55, 75, 125, 165, 275, 375, 625, 825, 997, 1375, 1875, 2991, 4125, 4985, 6875, 10967, 14955, 20625, 24925, 32901, 54835, 74775, 124625, 164505, 274175, 373875, 623125, 822525, 1370875, 1869375, 4112625, 6854375, 20563125]

約数ペア:

[(1, 20563125), (3, 6854375), (5, 4112625), (11, 1869375), (15, 1370875), (25, 822525), (33, 623125), (55, 373875), (75, 274175), (125, 164505), (165, 124625), (275, 74775), (375, 54835), (625, 32901), (825, 24925), (997, 20625), (1375, 14955), (1875, 10967), (2991, 6875), (4125, 4985)]