21539120

素因数分解:

$2^4\times 5^1\times {\mathrm{307}}^1\times {\mathrm{877}}^1$

素因数の和:1197

約数の個数: 40

約数和(自身を含む): 50298864

約数和(自身を除く): 28759744

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 307, 614, 877, 1228, 1535, 1754, 2456, 3070, 3508, 4385, 4912, 6140, 7016, 8770, 12280, 14032, 17540, 24560, 35080, 70160, 269239, 538478, 1076956, 1346195, 2153912, 2692390, 4307824, 5384780, 10769560, 21539120]

約数ペア:

[(1, 21539120), (2, 10769560), (4, 5384780), (5, 4307824), (8, 2692390), (10, 2153912), (16, 1346195), (20, 1076956), (40, 538478), (80, 269239), (307, 70160), (614, 35080), (877, 24560), (1228, 17540), (1535, 14032), (1754, 12280), (2456, 8770), (3070, 7016), (3508, 6140), (4385, 4912)]