21841020

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{1709}}^1$

素因数の和:1795

約数の個数: 72

約数和(自身を含む): 67223520

約数和(自身を除く): 45382500

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 71, 90, 142, 180, 213, 284, 355, 426, 639, 710, 852, 1065, 1278, 1420, 1709, 2130, 2556, 3195, 3418, 4260, 5127, 6390, 6836, 8545, 10254, 12780, 15381, 17090, 20508, 25635, 30762, 34180, 51270, 61524, 76905, 102540, 121339, 153810, 242678, 307620, 364017, 485356, 606695, 728034, 1092051, 1213390, 1456068, 1820085, 2184102, 2426780, 3640170, 4368204, 5460255, 7280340, 10920510, 21841020]

約数ペア:

[(1, 21841020), (2, 10920510), (3, 7280340), (4, 5460255), (5, 4368204), (6, 3640170), (9, 2426780), (10, 2184102), (12, 1820085), (15, 1456068), (18, 1213390), (20, 1092051), (30, 728034), (36, 606695), (45, 485356), (60, 364017), (71, 307620), (90, 242678), (142, 153810), (180, 121339), (213, 102540), (284, 76905), (355, 61524), (426, 51270), (639, 34180), (710, 30762), (852, 25635), (1065, 20508), (1278, 17090), (1420, 15381), (1709, 12780), (2130, 10254), (2556, 8545), (3195, 6836), (3418, 6390), (4260, 5127)]