19984875

素因数分解:

$3^1\times 5^3\times {\mathrm{137}}^1\times {\mathrm{389}}^1$

素因数の和:544

約数の個数: 32

約数和(自身を含む): 33583680

約数和(自身を除く): 13598805

約数列:

[1, 3, 5, 15, 25, 75, 125, 137, 375, 389, 411, 685, 1167, 1945, 2055, 3425, 5835, 9725, 10275, 17125, 29175, 48625, 51375, 53293, 145875, 159879, 266465, 799395, 1332325, 3996975, 6661625, 19984875]

約数ペア:

[(1, 19984875), (3, 6661625), (5, 3996975), (15, 1332325), (25, 799395), (75, 266465), (125, 159879), (137, 145875), (375, 53293), (389, 51375), (411, 48625), (685, 29175), (1167, 17125), (1945, 10275), (2055, 9725), (3425, 5835)]