21947793

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{821}}^1$

素因数の和:917

約数の個数: 32

約数和(自身を含む): 35773440

約数和(自身を除く): 13825647

約数列:

[1, 3, 7, 19, 21, 57, 67, 133, 201, 399, 469, 821, 1273, 1407, 2463, 3819, 5747, 8911, 15599, 17241, 26733, 46797, 55007, 109193, 165021, 327579, 385049, 1045133, 1155147, 3135399, 7315931, 21947793]

約数ペア:

[(1, 21947793), (3, 7315931), (7, 3135399), (19, 1155147), (21, 1045133), (57, 385049), (67, 327579), (133, 165021), (201, 109193), (399, 55007), (469, 46797), (821, 26733), (1273, 17241), (1407, 15599), (2463, 8911), (3819, 5747)]