21016875

素因数分解:

$3^1\times 5^4\times {\mathrm{11}}^1\times {\mathrm{1019}}^1$

素因数の和:1053

約数の個数: 40

約数和(自身を含む): 38237760

約数和(自身を除く): 17220885

約数列:

[1, 3, 5, 11, 15, 25, 33, 55, 75, 125, 165, 275, 375, 625, 825, 1019, 1375, 1875, 3057, 4125, 5095, 6875, 11209, 15285, 20625, 25475, 33627, 56045, 76425, 127375, 168135, 280225, 382125, 636875, 840675, 1401125, 1910625, 4203375, 7005625, 21016875]

約数ペア:

[(1, 21016875), (3, 7005625), (5, 4203375), (11, 1910625), (15, 1401125), (25, 840675), (33, 636875), (55, 382125), (75, 280225), (125, 168135), (165, 127375), (275, 76425), (375, 56045), (625, 33627), (825, 25475), (1019, 20625), (1375, 15285), (1875, 11209), (3057, 6875), (4125, 5095)]