21356595

素因数分解:

$3^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{283}}^1$

素因数の和:353

約数の個数: 64

約数和(自身を含む): 41986560

約数和(自身を除く): 20629965

約数列:

[1, 3, 5, 9, 13, 15, 27, 39, 43, 45, 65, 117, 129, 135, 195, 215, 283, 351, 387, 559, 585, 645, 849, 1161, 1415, 1677, 1755, 1935, 2547, 2795, 3679, 4245, 5031, 5805, 7641, 8385, 11037, 12169, 12735, 15093, 18395, 25155, 33111, 36507, 38205, 55185, 60845, 75465, 99333, 109521, 158197, 165555, 182535, 328563, 474591, 496665, 547605, 790985, 1423773, 1642815, 2372955, 4271319, 7118865, 21356595]

約数ペア:

[(1, 21356595), (3, 7118865), (5, 4271319), (9, 2372955), (13, 1642815), (15, 1423773), (27, 790985), (39, 547605), (43, 496665), (45, 474591), (65, 328563), (117, 182535), (129, 165555), (135, 158197), (195, 109521), (215, 99333), (283, 75465), (351, 60845), (387, 55185), (559, 38205), (585, 36507), (645, 33111), (849, 25155), (1161, 18395), (1415, 15093), (1677, 12735), (1755, 12169), (1935, 11037), (2547, 8385), (2795, 7641), (3679, 5805), (4245, 5031)]