20439375

素因数分解:

$3^1\times 5^4\times {\mathrm{11}}^1\times {\mathrm{991}}^1$

素因数の和:1025

約数の個数: 40

約数和(自身を含む): 37188096

約数和(自身を除く): 16748721

約数列:

[1, 3, 5, 11, 15, 25, 33, 55, 75, 125, 165, 275, 375, 625, 825, 991, 1375, 1875, 2973, 4125, 4955, 6875, 10901, 14865, 20625, 24775, 32703, 54505, 74325, 123875, 163515, 272525, 371625, 619375, 817575, 1362625, 1858125, 4087875, 6813125, 20439375]

約数ペア:

[(1, 20439375), (3, 6813125), (5, 4087875), (11, 1858125), (15, 1362625), (25, 817575), (33, 619375), (55, 371625), (75, 272525), (125, 163515), (165, 123875), (275, 74325), (375, 54505), (625, 32703), (825, 24775), (991, 20625), (1375, 14865), (1875, 10901), (2973, 6875), (4125, 4955)]