20878120

素因数分解:

$2^3\times 5^1\times {\mathrm{79}}^1\times {\mathrm{6607}}^1$

素因数の和:6697

約数の個数: 32

約数和(自身を含む): 47577600

約数和(自身を除く): 26699480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 79, 158, 316, 395, 632, 790, 1580, 3160, 6607, 13214, 26428, 33035, 52856, 66070, 132140, 264280, 521953, 1043906, 2087812, 2609765, 4175624, 5219530, 10439060, 20878120]

約数ペア:

[(1, 20878120), (2, 10439060), (4, 5219530), (5, 4175624), (8, 2609765), (10, 2087812), (20, 1043906), (40, 521953), (79, 264280), (158, 132140), (316, 66070), (395, 52856), (632, 33035), (790, 26428), (1580, 13214), (3160, 6607)]