21208240

素因数分解:

$2^4\times 5^1\times {\mathrm{353}}^1\times {\mathrm{751}}^1$

素因数の和:1117

約数の個数: 40

約数和(自身を含む): 49514688

約数和(自身を除く): 28306448

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 353, 706, 751, 1412, 1502, 1765, 2824, 3004, 3530, 3755, 5648, 6008, 7060, 7510, 12016, 14120, 15020, 28240, 30040, 60080, 265103, 530206, 1060412, 1325515, 2120824, 2651030, 4241648, 5302060, 10604120, 21208240]

約数ペア:

[(1, 21208240), (2, 10604120), (4, 5302060), (5, 4241648), (8, 2651030), (10, 2120824), (16, 1325515), (20, 1060412), (40, 530206), (80, 265103), (353, 60080), (706, 30040), (751, 28240), (1412, 15020), (1502, 14120), (1765, 12016), (2824, 7510), (3004, 7060), (3530, 6008), (3755, 5648)]