21771680

素因数分解:

$2^5\times 5^1\times 7^2\times {\mathrm{2777}}^1$

素因数の和:2806

約数の個数: 72

約数和(自身を含む): 59854788

約数和(自身を除く): 38083108

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 49, 56, 70, 80, 98, 112, 140, 160, 196, 224, 245, 280, 392, 490, 560, 784, 980, 1120, 1568, 1960, 2777, 3920, 5554, 7840, 11108, 13885, 19439, 22216, 27770, 38878, 44432, 55540, 77756, 88864, 97195, 111080, 136073, 155512, 194390, 222160, 272146, 311024, 388780, 444320, 544292, 622048, 680365, 777560, 1088584, 1360730, 1555120, 2177168, 2721460, 3110240, 4354336, 5442920, 10885840, 21771680]

約数ペア:

[(1, 21771680), (2, 10885840), (4, 5442920), (5, 4354336), (7, 3110240), (8, 2721460), (10, 2177168), (14, 1555120), (16, 1360730), (20, 1088584), (28, 777560), (32, 680365), (35, 622048), (40, 544292), (49, 444320), (56, 388780), (70, 311024), (80, 272146), (98, 222160), (112, 194390), (140, 155512), (160, 136073), (196, 111080), (224, 97195), (245, 88864), (280, 77756), (392, 55540), (490, 44432), (560, 38878), (784, 27770), (980, 22216), (1120, 19439), (1568, 13885), (1960, 11108), (2777, 7840), (3920, 5554)]