21128265

素因数分解:

$3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{179}}^1$

素因数の和:294

約数の個数: 48

約数和(自身を含む): 38301120

約数和(自身を除く): 17172855

約数列:

[1, 3, 5, 9, 15, 43, 45, 61, 129, 179, 183, 215, 305, 387, 537, 549, 645, 895, 915, 1611, 1935, 2623, 2685, 2745, 7697, 7869, 8055, 10919, 13115, 23091, 23607, 32757, 38485, 39345, 54595, 69273, 98271, 115455, 118035, 163785, 346365, 469517, 491355, 1408551, 2347585, 4225653, 7042755, 21128265]

約数ペア:

[(1, 21128265), (3, 7042755), (5, 4225653), (9, 2347585), (15, 1408551), (43, 491355), (45, 469517), (61, 346365), (129, 163785), (179, 118035), (183, 115455), (215, 98271), (305, 69273), (387, 54595), (537, 39345), (549, 38485), (645, 32757), (895, 23607), (915, 23091), (1611, 13115), (1935, 10919), (2623, 8055), (2685, 7869), (2745, 7697)]