21978130

素因数分解:

$2^1\times 5^1\times {\mathrm{307}}^1\times {\mathrm{7159}}^1$

素因数の和:7473

約数の個数: 16

約数和(自身を含む): 39695040

約数和(自身を除く): 17716910

約数列:

[1, 2, 5, 10, 307, 614, 1535, 3070, 7159, 14318, 35795, 71590, 2197813, 4395626, 10989065, 21978130]

約数ペア:

[(1, 21978130), (2, 10989065), (5, 4395626), (10, 2197813), (307, 71590), (614, 35795), (1535, 14318), (3070, 7159)]