21028420

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{150203}}^1$

素因数の和:150219

約数の個数: 24

約数和(自身を含む): 50468544

約数和(自身を除く): 29440124

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 150203, 300406, 600812, 751015, 1051421, 1502030, 2102842, 3004060, 4205684, 5257105, 10514210, 21028420]

約数ペア:

[(1, 21028420), (2, 10514210), (4, 5257105), (5, 4205684), (7, 3004060), (10, 2102842), (14, 1502030), (20, 1051421), (28, 751015), (35, 600812), (70, 300406), (140, 150203)]