20397580

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{2749}}^1$

素因数の和:2818

約数の個数: 48

約数和(自身を含む): 49896000

約数和(自身を除く): 29498420

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 53, 70, 106, 140, 212, 265, 371, 530, 742, 1060, 1484, 1855, 2749, 3710, 5498, 7420, 10996, 13745, 19243, 27490, 38486, 54980, 76972, 96215, 145697, 192430, 291394, 384860, 582788, 728485, 1019879, 1456970, 2039758, 2913940, 4079516, 5099395, 10198790, 20397580]

約数ペア:

[(1, 20397580), (2, 10198790), (4, 5099395), (5, 4079516), (7, 2913940), (10, 2039758), (14, 1456970), (20, 1019879), (28, 728485), (35, 582788), (53, 384860), (70, 291394), (106, 192430), (140, 145697), (212, 96215), (265, 76972), (371, 54980), (530, 38486), (742, 27490), (1060, 19243), (1484, 13745), (1855, 10996), (2749, 7420), (3710, 5498)]