21656220

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{61}}^2\times {\mathrm{97}}^1$

素因数の和:231

約数の個数: 72

約数和(自身を含む): 62283312

約数和(自身を除く): 40627092

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 61, 97, 122, 183, 194, 244, 291, 305, 366, 388, 485, 582, 610, 732, 915, 970, 1164, 1220, 1455, 1830, 1940, 2910, 3660, 3721, 5820, 5917, 7442, 11163, 11834, 14884, 17751, 18605, 22326, 23668, 29585, 35502, 37210, 44652, 55815, 59170, 71004, 74420, 88755, 111630, 118340, 177510, 223260, 355020, 360937, 721874, 1082811, 1443748, 1804685, 2165622, 3609370, 4331244, 5414055, 7218740, 10828110, 21656220]

約数ペア:

[(1, 21656220), (2, 10828110), (3, 7218740), (4, 5414055), (5, 4331244), (6, 3609370), (10, 2165622), (12, 1804685), (15, 1443748), (20, 1082811), (30, 721874), (60, 360937), (61, 355020), (97, 223260), (122, 177510), (183, 118340), (194, 111630), (244, 88755), (291, 74420), (305, 71004), (366, 59170), (388, 55815), (485, 44652), (582, 37210), (610, 35502), (732, 29585), (915, 23668), (970, 22326), (1164, 18605), (1220, 17751), (1455, 14884), (1830, 11834), (1940, 11163), (2910, 7442), (3660, 5917), (3721, 5820)]