21085375

素因数分解:

$5^3\times {\mathrm{37}}^1\times {\mathrm{47}}^1\times {\mathrm{97}}^1$

素因数の和:196

約数の個数: 32

約数和(自身を含む): 27885312

約数和(自身を除く): 6799937

約数列:

[1, 5, 25, 37, 47, 97, 125, 185, 235, 485, 925, 1175, 1739, 2425, 3589, 4559, 4625, 5875, 8695, 12125, 17945, 22795, 43475, 89725, 113975, 168683, 217375, 448625, 569875, 843415, 4217075, 21085375]

約数ペア:

[(1, 21085375), (5, 4217075), (25, 843415), (37, 569875), (47, 448625), (97, 217375), (125, 168683), (185, 113975), (235, 89725), (485, 43475), (925, 22795), (1175, 17945), (1739, 12125), (2425, 8695), (3589, 5875), (4559, 4625)]