20915415

素因数分解:

$3^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{1201}}^1$

素因数の和:1261

約数の個数: 40

約数和(自身を含む): 38396688

約数和(自身を除く): 17481273

約数列:

[1, 3, 5, 9, 15, 27, 43, 45, 81, 129, 135, 215, 387, 405, 645, 1161, 1201, 1935, 3483, 3603, 5805, 6005, 10809, 17415, 18015, 32427, 51643, 54045, 97281, 154929, 162135, 258215, 464787, 486405, 774645, 1394361, 2323935, 4183083, 6971805, 20915415]

約数ペア:

[(1, 20915415), (3, 6971805), (5, 4183083), (9, 2323935), (15, 1394361), (27, 774645), (43, 486405), (45, 464787), (81, 258215), (129, 162135), (135, 154929), (215, 97281), (387, 54045), (405, 51643), (645, 32427), (1161, 18015), (1201, 17415), (1935, 10809), (3483, 6005), (3603, 5805)]