21142870

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{367}}^1\times {\mathrm{823}}^1$

素因数の和:1204

約数の個数: 32

約数和(自身を含む): 43665408

約数和(自身を除く): 22522538

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 367, 734, 823, 1646, 1835, 2569, 3670, 4115, 5138, 5761, 8230, 11522, 12845, 25690, 28805, 57610, 302041, 604082, 1510205, 2114287, 3020410, 4228574, 10571435, 21142870]

約数ペア:

[(1, 21142870), (2, 10571435), (5, 4228574), (7, 3020410), (10, 2114287), (14, 1510205), (35, 604082), (70, 302041), (367, 57610), (734, 28805), (823, 25690), (1646, 12845), (1835, 11522), (2569, 8230), (3670, 5761), (4115, 5138)]