19887420

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{47351}}^1$

素因数の和:47370

約数の個数: 48

約数和(自身を含む): 63641088

約数和(自身を除く): 43753668

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 47351, 94702, 142053, 189404, 236755, 284106, 331457, 473510, 568212, 662914, 710265, 947020, 994371, 1325828, 1420530, 1657285, 1988742, 2841060, 3314570, 3977484, 4971855, 6629140, 9943710, 19887420]

約数ペア:

[(1, 19887420), (2, 9943710), (3, 6629140), (4, 4971855), (5, 3977484), (6, 3314570), (7, 2841060), (10, 1988742), (12, 1657285), (14, 1420530), (15, 1325828), (20, 994371), (21, 947020), (28, 710265), (30, 662914), (35, 568212), (42, 473510), (60, 331457), (70, 284106), (84, 236755), (105, 189404), (140, 142053), (210, 94702), (420, 47351)]