21735207

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{197}}^1$

素因数の和:280

約数の個数: 48

約数和(自身を含む): 36324288

約数和(自身を除く): 14589081

約数列:

[1, 3, 9, 13, 23, 39, 41, 69, 117, 123, 197, 207, 299, 369, 533, 591, 897, 943, 1599, 1773, 2561, 2691, 2829, 4531, 4797, 7683, 8077, 8487, 12259, 13593, 23049, 24231, 36777, 40779, 58903, 72693, 105001, 110331, 176709, 185771, 315003, 530127, 557313, 945009, 1671939, 2415023, 7245069, 21735207]

約数ペア:

[(1, 21735207), (3, 7245069), (9, 2415023), (13, 1671939), (23, 945009), (39, 557313), (41, 530127), (69, 315003), (117, 185771), (123, 176709), (197, 110331), (207, 105001), (299, 72693), (369, 58903), (533, 40779), (591, 36777), (897, 24231), (943, 23049), (1599, 13593), (1773, 12259), (2561, 8487), (2691, 8077), (2829, 7683), (4531, 4797)]