21021931

素因数分解:

$7^2\times {\mathrm{23}}^2\times {\mathrm{811}}^1$

素因数の和:871

約数の個数: 18

約数和(自身を含む): 25595052

約数和(自身を除く): 4573121

約数列:

[1, 7, 23, 49, 161, 529, 811, 1127, 3703, 5677, 18653, 25921, 39739, 130571, 429019, 913997, 3003133, 21021931]

約数ペア:

[(1, 21021931), (7, 3003133), (23, 913997), (49, 429019), (161, 130571), (529, 39739), (811, 25921), (1127, 18653), (3703, 5677)]