20871975

素因数分解:

$3^1\times 5^2\times {\mathrm{19}}^1\times {\mathrm{97}}^1\times {\mathrm{151}}^1$

素因数の和:280

約数の個数: 48

約数和(自身を含む): 36942080

約数和(自身を除く): 16070105

約数列:

[1, 3, 5, 15, 19, 25, 57, 75, 95, 97, 151, 285, 291, 453, 475, 485, 755, 1425, 1455, 1843, 2265, 2425, 2869, 3775, 5529, 7275, 8607, 9215, 11325, 14345, 14647, 27645, 43035, 43941, 46075, 71725, 73235, 138225, 215175, 219705, 278293, 366175, 834879, 1098525, 1391465, 4174395, 6957325, 20871975]

約数ペア:

[(1, 20871975), (3, 6957325), (5, 4174395), (15, 1391465), (19, 1098525), (25, 834879), (57, 366175), (75, 278293), (95, 219705), (97, 215175), (151, 138225), (285, 73235), (291, 71725), (453, 46075), (475, 43941), (485, 43035), (755, 27645), (1425, 14647), (1455, 14345), (1843, 11325), (2265, 9215), (2425, 8607), (2869, 7275), (3775, 5529)]