18718340

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{59}}^1\times {\mathrm{547}}^1$

素因数の和:644

約数の個数: 48

約数和(自身を含む): 41428800

約数和(自身を除く): 22710460

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 59, 116, 118, 145, 236, 290, 295, 547, 580, 590, 1094, 1180, 1711, 2188, 2735, 3422, 5470, 6844, 8555, 10940, 15863, 17110, 31726, 32273, 34220, 63452, 64546, 79315, 129092, 158630, 161365, 317260, 322730, 645460, 935917, 1871834, 3743668, 4679585, 9359170, 18718340]

約数ペア:

[(1, 18718340), (2, 9359170), (4, 4679585), (5, 3743668), (10, 1871834), (20, 935917), (29, 645460), (58, 322730), (59, 317260), (116, 161365), (118, 158630), (145, 129092), (236, 79315), (290, 64546), (295, 63452), (547, 34220), (580, 32273), (590, 31726), (1094, 17110), (1180, 15863), (1711, 10940), (2188, 8555), (2735, 6844), (3422, 5470)]