21000753340

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{251}}^2\times {\mathrm{2381}}^1$

素因数の和:2899

約数の個数: 72

約数和(自身を含む): 50624665056

約数和(自身を除く): 29623911716

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 251, 502, 1004, 1255, 1757, 2381, 2510, 3514, 4762, 5020, 7028, 8785, 9524, 11905, 16667, 17570, 23810, 33334, 35140, 47620, 63001, 66668, 83335, 126002, 166670, 252004, 315005, 333340, 441007, 597631, 630010, 882014, 1195262, 1260020, 1764028, 2205035, 2390524, 2988155, 4183417, 4410070, 5976310, 8366834, 8820140, 11952620, 16733668, 20917085, 41834170, 83668340, 150005381, 300010762, 600021524, 750026905, 1050037667, 1500053810, 2100075334, 3000107620, 4200150668, 5250188335, 10500376670, 21000753340]

約数ペア:

[(1, 21000753340), (2, 10500376670), (4, 5250188335), (5, 4200150668), (7, 3000107620), (10, 2100075334), (14, 1500053810), (20, 1050037667), (28, 750026905), (35, 600021524), (70, 300010762), (140, 150005381), (251, 83668340), (502, 41834170), (1004, 20917085), (1255, 16733668), (1757, 11952620), (2381, 8820140), (2510, 8366834), (3514, 5976310), (4762, 4410070), (5020, 4183417), (7028, 2988155), (8785, 2390524), (9524, 2205035), (11905, 1764028), (16667, 1260020), (17570, 1195262), (23810, 882014), (33334, 630010), (35140, 597631), (47620, 441007), (63001, 333340), (66668, 315005), (83335, 252004), (126002, 166670)]