19638220

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{691}}^1$

素因数の和:743

約数の個数: 72

約数和(自身を含む): 49699440

約数和(自身を除く): 30061220

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 29, 35, 49, 58, 70, 98, 116, 140, 145, 196, 203, 245, 290, 406, 490, 580, 691, 812, 980, 1015, 1382, 1421, 2030, 2764, 2842, 3455, 4060, 4837, 5684, 6910, 7105, 9674, 13820, 14210, 19348, 20039, 24185, 28420, 33859, 40078, 48370, 67718, 80156, 96740, 100195, 135436, 140273, 169295, 200390, 280546, 338590, 400780, 561092, 677180, 701365, 981911, 1402730, 1963822, 2805460, 3927644, 4909555, 9819110, 19638220]

約数ペア:

[(1, 19638220), (2, 9819110), (4, 4909555), (5, 3927644), (7, 2805460), (10, 1963822), (14, 1402730), (20, 981911), (28, 701365), (29, 677180), (35, 561092), (49, 400780), (58, 338590), (70, 280546), (98, 200390), (116, 169295), (140, 140273), (145, 135436), (196, 100195), (203, 96740), (245, 80156), (290, 67718), (406, 48370), (490, 40078), (580, 33859), (691, 28420), (812, 24185), (980, 20039), (1015, 19348), (1382, 14210), (1421, 13820), (2030, 9674), (2764, 7105), (2842, 6910), (3455, 5684), (4060, 4837)]