21974785

素因数分解:

$5^1\times 7^2\times {\mathrm{257}}^1\times {\mathrm{349}}^1$

素因数の和:625

約数の個数: 24

約数和(自身を含む): 30882600

約数和(自身を除く): 8907815

約数列:

[1, 5, 7, 35, 49, 245, 257, 349, 1285, 1745, 1799, 2443, 8995, 12215, 12593, 17101, 62965, 85505, 89693, 448465, 627851, 3139255, 4394957, 21974785]

約数ペア:

[(1, 21974785), (5, 4394957), (7, 3139255), (35, 627851), (49, 448465), (245, 89693), (257, 85505), (349, 62965), (1285, 17101), (1745, 12593), (1799, 12215), (2443, 8995)]