19997777648

素因数分解:

$2^4\times {\mathrm{10243}}^1\times {\mathrm{122021}}^1$

素因数の和:132272

約数の個数: 20

約数和(自身を含む): 38749794408

約数和(自身を除く): 18752016760

約数列:

[1, 2, 4, 8, 16, 10243, 20486, 40972, 81944, 122021, 163888, 244042, 488084, 976168, 1952336, 1249861103, 2499722206, 4999444412, 9998888824, 19997777648]

約数ペア:

[(1, 19997777648), (2, 9998888824), (4, 4999444412), (8, 2499722206), (16, 1249861103), (10243, 1952336), (20486, 976168), (40972, 488084), (81944, 244042), (122021, 163888)]