21708820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{5347}}^1$

素因数の和:5392

約数の個数: 48

約数和(自身を含む): 53907840

約数和(自身を除く): 32199020

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 29, 35, 58, 70, 116, 140, 145, 203, 290, 406, 580, 812, 1015, 2030, 4060, 5347, 10694, 21388, 26735, 37429, 53470, 74858, 106940, 149716, 155063, 187145, 310126, 374290, 620252, 748580, 775315, 1085441, 1550630, 2170882, 3101260, 4341764, 5427205, 10854410, 21708820]

約数ペア:

[(1, 21708820), (2, 10854410), (4, 5427205), (5, 4341764), (7, 3101260), (10, 2170882), (14, 1550630), (20, 1085441), (28, 775315), (29, 748580), (35, 620252), (58, 374290), (70, 310126), (116, 187145), (140, 155063), (145, 149716), (203, 106940), (290, 74858), (406, 53470), (580, 37429), (812, 26735), (1015, 21388), (2030, 10694), (4060, 5347)]