21499730

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{89}}^1$

素因数の和:156

約数の個数: 96

約数和(自身を含む): 49863600

約数和(自身を除く): 28363870

約数列:

[1, 2, 5, 7, 10, 14, 17, 29, 34, 35, 49, 58, 70, 85, 89, 98, 119, 145, 170, 178, 203, 238, 245, 290, 406, 445, 490, 493, 595, 623, 833, 890, 986, 1015, 1190, 1246, 1421, 1513, 1666, 2030, 2465, 2581, 2842, 3026, 3115, 3451, 4165, 4361, 4930, 5162, 6230, 6902, 7105, 7565, 8330, 8722, 10591, 12905, 14210, 15130, 17255, 18067, 21182, 21805, 24157, 25810, 34510, 36134, 43610, 43877, 48314, 52955, 74137, 87754, 90335, 105910, 120785, 126469, 148274, 180670, 219385, 241570, 252938, 307139, 370685, 438770, 614278, 632345, 741370, 1264690, 1535695, 2149973, 3071390, 4299946, 10749865, 21499730]

約数ペア:

[(1, 21499730), (2, 10749865), (5, 4299946), (7, 3071390), (10, 2149973), (14, 1535695), (17, 1264690), (29, 741370), (34, 632345), (35, 614278), (49, 438770), (58, 370685), (70, 307139), (85, 252938), (89, 241570), (98, 219385), (119, 180670), (145, 148274), (170, 126469), (178, 120785), (203, 105910), (238, 90335), (245, 87754), (290, 74137), (406, 52955), (445, 48314), (490, 43877), (493, 43610), (595, 36134), (623, 34510), (833, 25810), (890, 24157), (986, 21805), (1015, 21182), (1190, 18067), (1246, 17255), (1421, 15130), (1513, 14210), (1666, 12905), (2030, 10591), (2465, 8722), (2581, 8330), (2842, 7565), (3026, 7105), (3115, 6902), (3451, 6230), (4165, 5162), (4361, 4930)]