21107870

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{331}}^1\times {\mathrm{911}}^1$

素因数の和:1256

約数の個数: 32

約数和(自身を含む): 43600896

約数和(自身を除く): 22493026

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 331, 662, 911, 1655, 1822, 2317, 3310, 4555, 4634, 6377, 9110, 11585, 12754, 23170, 31885, 63770, 301541, 603082, 1507705, 2110787, 3015410, 4221574, 10553935, 21107870]

約数ペア:

[(1, 21107870), (2, 10553935), (5, 4221574), (7, 3015410), (10, 2110787), (14, 1507705), (35, 603082), (70, 301541), (331, 63770), (662, 31885), (911, 23170), (1655, 12754), (1822, 11585), (2317, 9110), (3310, 6377), (4555, 4634)]