20201985

素因数分解:

$3^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{6323}}^1$

素因数の和:6405

約数の個数: 24

約数和(自身を含む): 35515584

約数和(自身を除く): 15313599

約数列:

[1, 3, 5, 9, 15, 45, 71, 213, 355, 639, 1065, 3195, 6323, 18969, 31615, 56907, 94845, 284535, 448933, 1346799, 2244665, 4040397, 6733995, 20201985]

約数ペア:

[(1, 20201985), (3, 6733995), (5, 4040397), (9, 2244665), (15, 1346799), (45, 448933), (71, 284535), (213, 94845), (355, 56907), (639, 31615), (1065, 18969), (3195, 6323)]