21221145

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{997}}^1$

素因数の和:1062

約数の個数: 48

約数和(自身を含む): 41101632

約数和(自身を除く): 19880487

約数列:

[1, 3, 5, 9, 11, 15, 33, 43, 45, 55, 99, 129, 165, 215, 387, 473, 495, 645, 997, 1419, 1935, 2365, 2991, 4257, 4985, 7095, 8973, 10967, 14955, 21285, 32901, 42871, 44865, 54835, 98703, 128613, 164505, 214355, 385839, 471581, 493515, 643065, 1414743, 1929195, 2357905, 4244229, 7073715, 21221145]

約数ペア:

[(1, 21221145), (3, 7073715), (5, 4244229), (9, 2357905), (11, 1929195), (15, 1414743), (33, 643065), (43, 493515), (45, 471581), (55, 385839), (99, 214355), (129, 164505), (165, 128613), (215, 98703), (387, 54835), (473, 44865), (495, 42871), (645, 32901), (997, 21285), (1419, 14955), (1935, 10967), (2365, 8973), (2991, 7095), (4257, 4985)]