20856225

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{21391}}^1$

素因数の和:21417

約数の個数: 24

約数和(自身を含む): 37136512

約数和(自身を除く): 16280287

約数列:

[1, 3, 5, 13, 15, 25, 39, 65, 75, 195, 325, 975, 21391, 64173, 106955, 278083, 320865, 534775, 834249, 1390415, 1604325, 4171245, 6952075, 20856225]

約数ペア:

[(1, 20856225), (3, 6952075), (5, 4171245), (13, 1604325), (15, 1390415), (25, 834249), (39, 534775), (65, 320865), (75, 278083), (195, 106955), (325, 64173), (975, 21391)]