21357843

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^2\times {\mathrm{37}}^1\times {\mathrm{41}}^1$

素因数の和:132

約数の個数: 48

約数和(自身を含む): 34052256

約数和(自身を除く): 12694413

約数列:

[1, 3, 13, 19, 37, 39, 41, 57, 111, 123, 247, 361, 481, 533, 703, 741, 779, 1083, 1443, 1517, 1599, 2109, 2337, 4551, 4693, 9139, 10127, 13357, 14079, 14801, 19721, 27417, 28823, 30381, 40071, 44403, 59163, 86469, 173641, 192413, 374699, 520923, 547637, 577239, 1124097, 1642911, 7119281, 21357843]

約数ペア:

[(1, 21357843), (3, 7119281), (13, 1642911), (19, 1124097), (37, 577239), (39, 547637), (41, 520923), (57, 374699), (111, 192413), (123, 173641), (247, 86469), (361, 59163), (481, 44403), (533, 40071), (703, 30381), (741, 28823), (779, 27417), (1083, 19721), (1443, 14801), (1517, 14079), (1599, 13357), (2109, 10127), (2337, 9139), (4551, 4693)]