20855240

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{211}}^1\times {\mathrm{353}}^1$

素因数の和:582

約数の個数: 64

約数和(自身を含む): 54034560

約数和(自身を除く): 33179320

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 211, 280, 353, 422, 706, 844, 1055, 1412, 1477, 1688, 1765, 2110, 2471, 2824, 2954, 3530, 4220, 4942, 5908, 7060, 7385, 8440, 9884, 11816, 12355, 14120, 14770, 19768, 24710, 29540, 49420, 59080, 74483, 98840, 148966, 297932, 372415, 521381, 595864, 744830, 1042762, 1489660, 2085524, 2606905, 2979320, 4171048, 5213810, 10427620, 20855240]

約数ペア:

[(1, 20855240), (2, 10427620), (4, 5213810), (5, 4171048), (7, 2979320), (8, 2606905), (10, 2085524), (14, 1489660), (20, 1042762), (28, 744830), (35, 595864), (40, 521381), (56, 372415), (70, 297932), (140, 148966), (211, 98840), (280, 74483), (353, 59080), (422, 49420), (706, 29540), (844, 24710), (1055, 19768), (1412, 14770), (1477, 14120), (1688, 12355), (1765, 11816), (2110, 9884), (2471, 8440), (2824, 7385), (2954, 7060), (3530, 5908), (4220, 4942)]