21369387

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{59}}^1\times {\mathrm{251}}^1$

素因数の和:363

約数の個数: 32

約数和(自身を含む): 32175360

約数和(自身を除く): 10805973

約数列:

[1, 3, 13, 37, 39, 59, 111, 177, 251, 481, 753, 767, 1443, 2183, 2301, 3263, 6549, 9287, 9789, 14809, 27861, 28379, 44427, 85137, 120731, 192517, 362193, 547933, 577551, 1643799, 7123129, 21369387]

約数ペア:

[(1, 21369387), (3, 7123129), (13, 1643799), (37, 577551), (39, 547933), (59, 362193), (111, 192517), (177, 120731), (251, 85137), (481, 44427), (753, 28379), (767, 27861), (1443, 14809), (2183, 9789), (2301, 9287), (3263, 6549)]