21006320

素因数分解:

$2^4\times 5^1\times {\mathrm{97}}^1\times {\mathrm{2707}}^1$

素因数の和:2817

約数の個数: 40

約数和(自身を含む): 49361424

約数和(自身を除く): 28355104

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 97, 194, 388, 485, 776, 970, 1552, 1940, 2707, 3880, 5414, 7760, 10828, 13535, 21656, 27070, 43312, 54140, 108280, 216560, 262579, 525158, 1050316, 1312895, 2100632, 2625790, 4201264, 5251580, 10503160, 21006320]

約数ペア:

[(1, 21006320), (2, 10503160), (4, 5251580), (5, 4201264), (8, 2625790), (10, 2100632), (16, 1312895), (20, 1050316), (40, 525158), (80, 262579), (97, 216560), (194, 108280), (388, 54140), (485, 43312), (776, 27070), (970, 21656), (1552, 13535), (1940, 10828), (2707, 7760), (3880, 5414)]