20001405

素因数分解:

$3^1\times 5^1\times {\mathrm{53}}^1\times {\mathrm{139}}^1\times {\mathrm{181}}^1$

素因数の和:381

約数の個数: 32

約数和(自身を含む): 33022080

約数和(自身を除く): 13020675

約数列:

[1, 3, 5, 15, 53, 139, 159, 181, 265, 417, 543, 695, 795, 905, 2085, 2715, 7367, 9593, 22101, 25159, 28779, 36835, 47965, 75477, 110505, 125795, 143895, 377385, 1333427, 4000281, 6667135, 20001405]

約数ペア:

[(1, 20001405), (3, 6667135), (5, 4000281), (15, 1333427), (53, 377385), (139, 143895), (159, 125795), (181, 110505), (265, 75477), (417, 47965), (543, 36835), (695, 28779), (795, 25159), (905, 22101), (2085, 9593), (2715, 7367)]