19721324

素因数分解:

$2^2\times 7^2\times {\mathrm{239}}^1\times {\mathrm{421}}^1$

素因数の和:678

約数の個数: 36

約数和(自身を含む): 40410720

約数和(自身を除く): 20689396

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 196, 239, 421, 478, 842, 956, 1673, 1684, 2947, 3346, 5894, 6692, 11711, 11788, 20629, 23422, 41258, 46844, 82516, 100619, 201238, 402476, 704333, 1408666, 2817332, 4930331, 9860662, 19721324]

約数ペア:

[(1, 19721324), (2, 9860662), (4, 4930331), (7, 2817332), (14, 1408666), (28, 704333), (49, 402476), (98, 201238), (196, 100619), (239, 82516), (421, 46844), (478, 41258), (842, 23422), (956, 20629), (1673, 11788), (1684, 11711), (2947, 6692), (3346, 5894)]