20871406

素因数分解:

$2^1\times {\mathrm{139}}^1\times {\mathrm{193}}^1\times {\mathrm{389}}^1$

素因数の和:723

約数の個数: 16

約数和(自身を含む): 31777200

約数和(自身を除く): 10905794

約数列:

[1, 2, 139, 193, 278, 386, 389, 778, 26827, 53654, 54071, 75077, 108142, 150154, 10435703, 20871406]

約数ペア:

[(1, 20871406), (2, 10435703), (139, 150154), (193, 108142), (278, 75077), (386, 54071), (389, 53654), (778, 26827)]