20159875

素因数分解:

$5^3\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{179}}^1$

素因数の和:264

約数の個数: 32

約数和(自身を含む): 27293760

約数和(自身を除く): 7133885

約数列:

[1, 5, 17, 25, 53, 85, 125, 179, 265, 425, 895, 901, 1325, 2125, 3043, 4475, 4505, 6625, 9487, 15215, 22375, 22525, 47435, 76075, 112625, 161279, 237175, 380375, 806395, 1185875, 4031975, 20159875]

約数ペア:

[(1, 20159875), (5, 4031975), (17, 1185875), (25, 806395), (53, 380375), (85, 237175), (125, 161279), (179, 112625), (265, 76075), (425, 47435), (895, 22525), (901, 22375), (1325, 15215), (2125, 9487), (3043, 6625), (4475, 4505)]