21990276

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{7933}}^1$

素因数の和:7961

約数の個数: 72

約数和(自身を含む): 69311424

約数和(自身を除く): 47321148

約数列:

[1, 2, 3, 4, 6, 7, 9, 11, 12, 14, 18, 21, 22, 28, 33, 36, 42, 44, 63, 66, 77, 84, 99, 126, 132, 154, 198, 231, 252, 308, 396, 462, 693, 924, 1386, 2772, 7933, 15866, 23799, 31732, 47598, 55531, 71397, 87263, 95196, 111062, 142794, 166593, 174526, 222124, 261789, 285588, 333186, 349052, 499779, 523578, 610841, 666372, 785367, 999558, 1047156, 1221682, 1570734, 1832523, 1999116, 2443364, 3141468, 3665046, 5497569, 7330092, 10995138, 21990276]

約数ペア:

[(1, 21990276), (2, 10995138), (3, 7330092), (4, 5497569), (6, 3665046), (7, 3141468), (9, 2443364), (11, 1999116), (12, 1832523), (14, 1570734), (18, 1221682), (21, 1047156), (22, 999558), (28, 785367), (33, 666372), (36, 610841), (42, 523578), (44, 499779), (63, 349052), (66, 333186), (77, 285588), (84, 261789), (99, 222124), (126, 174526), (132, 166593), (154, 142794), (198, 111062), (231, 95196), (252, 87263), (308, 71397), (396, 55531), (462, 47598), (693, 31732), (924, 23799), (1386, 15866), (2772, 7933)]