21142760

素因数分解:

$2^3\times 5^1\times {\mathrm{53}}^1\times {\mathrm{9973}}^1$

素因数の和:10037

約数の個数: 32

約数和(自身を含む): 48473640

約数和(自身を除く): 27330880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 53, 106, 212, 265, 424, 530, 1060, 2120, 9973, 19946, 39892, 49865, 79784, 99730, 199460, 398920, 528569, 1057138, 2114276, 2642845, 4228552, 5285690, 10571380, 21142760]

約数ペア:

[(1, 21142760), (2, 10571380), (4, 5285690), (5, 4228552), (8, 2642845), (10, 2114276), (20, 1057138), (40, 528569), (53, 398920), (106, 199460), (212, 99730), (265, 79784), (424, 49865), (530, 39892), (1060, 19946), (2120, 9973)]