21222640

素因数分解:

$2^4\times 5^1\times {\mathrm{311}}^1\times {\mathrm{853}}^1$

素因数の和:1177

約数の個数: 40

約数和(自身を含む): 49559328

約数和(自身を除く): 28336688

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 311, 622, 853, 1244, 1555, 1706, 2488, 3110, 3412, 4265, 4976, 6220, 6824, 8530, 12440, 13648, 17060, 24880, 34120, 68240, 265283, 530566, 1061132, 1326415, 2122264, 2652830, 4244528, 5305660, 10611320, 21222640]

約数ペア:

[(1, 21222640), (2, 10611320), (4, 5305660), (5, 4244528), (8, 2652830), (10, 2122264), (16, 1326415), (20, 1061132), (40, 530566), (80, 265283), (311, 68240), (622, 34120), (853, 24880), (1244, 17060), (1555, 13648), (1706, 12440), (2488, 8530), (3110, 6824), (3412, 6220), (4265, 4976)]