21364420

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13873}}^1$

素因数の和:13900

約数の個数: 48

約数和(自身を含む): 55939968

約数和(自身を除く): 34575548

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 110, 140, 154, 220, 308, 385, 770, 1540, 13873, 27746, 55492, 69365, 97111, 138730, 152603, 194222, 277460, 305206, 388444, 485555, 610412, 763015, 971110, 1068221, 1526030, 1942220, 2136442, 3052060, 4272884, 5341105, 10682210, 21364420]

約数ペア:

[(1, 21364420), (2, 10682210), (4, 5341105), (5, 4272884), (7, 3052060), (10, 2136442), (11, 1942220), (14, 1526030), (20, 1068221), (22, 971110), (28, 763015), (35, 610412), (44, 485555), (55, 388444), (70, 305206), (77, 277460), (110, 194222), (140, 152603), (154, 138730), (220, 97111), (308, 69365), (385, 55492), (770, 27746), (1540, 13873)]