21000851935

素因数分解:

$5^1\times 7^2\times {\mathrm{149}}^1\times {\mathrm{419}}^1\times {\mathrm{1373}}^1$

素因数の和:1960

約数の個数: 48

約数和(自身を含む): 29604204000

約数和(自身を除く): 8603352065

約数列:

[1, 5, 7, 35, 49, 149, 245, 419, 745, 1043, 1373, 2095, 2933, 5215, 6865, 7301, 9611, 14665, 20531, 36505, 48055, 62431, 67277, 102655, 204577, 312155, 336385, 437017, 575287, 1022885, 1432039, 2185085, 2876435, 3059119, 4027009, 7160195, 10024273, 15295595, 20135045, 28189063, 50121365, 85717763, 140945315, 428588815, 600024341, 3000121705, 4200170387, 21000851935]

約数ペア:

[(1, 21000851935), (5, 4200170387), (7, 3000121705), (35, 600024341), (49, 428588815), (149, 140945315), (245, 85717763), (419, 50121365), (745, 28189063), (1043, 20135045), (1373, 15295595), (2095, 10024273), (2933, 7160195), (5215, 4027009), (6865, 3059119), (7301, 2876435), (9611, 2185085), (14665, 1432039), (20531, 1022885), (36505, 575287), (48055, 437017), (62431, 336385), (67277, 312155), (102655, 204577)]