21586875

素因数分解:

$3^1\times 5^4\times {\mathrm{29}}^1\times {\mathrm{397}}^1$

素因数の和:449

約数の個数: 40

約数和(自身を含む): 37300560

約数和(自身を除く): 15713685

約数列:

[1, 3, 5, 15, 25, 29, 75, 87, 125, 145, 375, 397, 435, 625, 725, 1191, 1875, 1985, 2175, 3625, 5955, 9925, 10875, 11513, 18125, 29775, 34539, 49625, 54375, 57565, 148875, 172695, 248125, 287825, 744375, 863475, 1439125, 4317375, 7195625, 21586875]

約数ペア:

[(1, 21586875), (3, 7195625), (5, 4317375), (15, 1439125), (25, 863475), (29, 744375), (75, 287825), (87, 248125), (125, 172695), (145, 148875), (375, 57565), (397, 54375), (435, 49625), (625, 34539), (725, 29775), (1191, 18125), (1875, 11513), (1985, 10875), (2175, 9925), (3625, 5955)]