20210380840

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{38866117}}^1$

素因数の和:38866141

約数の個数: 32

約数和(自身を含む): 48971308680

約数和(自身を除く): 28760927840

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 38866117, 77732234, 155464468, 194330585, 310928936, 388661170, 505259521, 777322340, 1010519042, 1554644680, 2021038084, 2526297605, 4042076168, 5052595210, 10105190420, 20210380840]

約数ペア:

[(1, 20210380840), (2, 10105190420), (4, 5052595210), (5, 4042076168), (8, 2526297605), (10, 2021038084), (13, 1554644680), (20, 1010519042), (26, 777322340), (40, 505259521), (52, 388661170), (65, 310928936), (104, 194330585), (130, 155464468), (260, 77732234), (520, 38866117)]