21027680

素因数分解:

$2^5\times 5^1\times {\mathrm{19}}^1\times {\mathrm{6917}}^1$

素因数の和:6951

約数の個数: 48

約数和(自身を含む): 52300080

約数和(自身を除く): 31272400

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 76, 80, 95, 152, 160, 190, 304, 380, 608, 760, 1520, 3040, 6917, 13834, 27668, 34585, 55336, 69170, 110672, 131423, 138340, 221344, 262846, 276680, 525692, 553360, 657115, 1051384, 1106720, 1314230, 2102768, 2628460, 4205536, 5256920, 10513840, 21027680]

約数ペア:

[(1, 21027680), (2, 10513840), (4, 5256920), (5, 4205536), (8, 2628460), (10, 2102768), (16, 1314230), (19, 1106720), (20, 1051384), (32, 657115), (38, 553360), (40, 525692), (76, 276680), (80, 262846), (95, 221344), (152, 138340), (160, 131423), (190, 110672), (304, 69170), (380, 55336), (608, 34585), (760, 27668), (1520, 13834), (3040, 6917)]