20854820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{181}}^1\times {\mathrm{823}}^1$

素因数の和:1020

約数の個数: 48

約数和(自身を含む): 50389248

約数和(自身を除く): 29534428

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 181, 362, 724, 823, 905, 1267, 1646, 1810, 2534, 3292, 3620, 4115, 5068, 5761, 6335, 8230, 11522, 12670, 16460, 23044, 25340, 28805, 57610, 115220, 148963, 297926, 595852, 744815, 1042741, 1489630, 2085482, 2979260, 4170964, 5213705, 10427410, 20854820]

約数ペア:

[(1, 20854820), (2, 10427410), (4, 5213705), (5, 4170964), (7, 2979260), (10, 2085482), (14, 1489630), (20, 1042741), (28, 744815), (35, 595852), (70, 297926), (140, 148963), (181, 115220), (362, 57610), (724, 28805), (823, 25340), (905, 23044), (1267, 16460), (1646, 12670), (1810, 11522), (2534, 8230), (3292, 6335), (3620, 5761), (4115, 5068)]