20661320

素因数分解:

$2^3\times 5^1\times {\mathrm{131}}^1\times {\mathrm{3943}}^1$

素因数の和:4085

約数の個数: 32

約数和(自身を含む): 46854720

約数和(自身を除く): 26193400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 131, 262, 524, 655, 1048, 1310, 2620, 3943, 5240, 7886, 15772, 19715, 31544, 39430, 78860, 157720, 516533, 1033066, 2066132, 2582665, 4132264, 5165330, 10330660, 20661320]

約数ペア:

[(1, 20661320), (2, 10330660), (4, 5165330), (5, 4132264), (8, 2582665), (10, 2066132), (20, 1033066), (40, 516533), (131, 157720), (262, 78860), (524, 39430), (655, 31544), (1048, 19715), (1310, 15772), (2620, 7886), (3943, 5240)]