20428135

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{139}}^1$

素因数の和:200

約数の個数: 64

約数和(自身を含む): 33868800

約数和(自身を除く): 13440665

約数列:

[1, 5, 7, 13, 17, 19, 35, 65, 85, 91, 95, 119, 133, 139, 221, 247, 323, 455, 595, 665, 695, 973, 1105, 1235, 1547, 1615, 1729, 1807, 2261, 2363, 2641, 4199, 4865, 7735, 8645, 9035, 11305, 11815, 12649, 13205, 16541, 18487, 20995, 29393, 30719, 34333, 44897, 63245, 82705, 92435, 146965, 153595, 171665, 215033, 224485, 240331, 314279, 583661, 1075165, 1201655, 1571395, 2918305, 4085627, 20428135]

約数ペア:

[(1, 20428135), (5, 4085627), (7, 2918305), (13, 1571395), (17, 1201655), (19, 1075165), (35, 583661), (65, 314279), (85, 240331), (91, 224485), (95, 215033), (119, 171665), (133, 153595), (139, 146965), (221, 92435), (247, 82705), (323, 63245), (455, 44897), (595, 34333), (665, 30719), (695, 29393), (973, 20995), (1105, 18487), (1235, 16541), (1547, 13205), (1615, 12649), (1729, 11815), (1807, 11305), (2261, 9035), (2363, 8645), (2641, 7735), (4199, 4865)]