213406840

素因数分解:

$2^3\times 5^1\times {\mathrm{1289}}^1\times {\mathrm{4139}}^1$

素因数の和:5439

約数の個数: 32

約数和(自身を含む): 480654000

約数和(自身を除く): 267247160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1289, 2578, 4139, 5156, 6445, 8278, 10312, 12890, 16556, 20695, 25780, 33112, 41390, 51560, 82780, 165560, 5335171, 10670342, 21340684, 26675855, 42681368, 53351710, 106703420, 213406840]

約数ペア:

[(1, 213406840), (2, 106703420), (4, 53351710), (5, 42681368), (8, 26675855), (10, 21340684), (20, 10670342), (40, 5335171), (1289, 165560), (2578, 82780), (4139, 51560), (5156, 41390), (6445, 33112), (8278, 25780), (10312, 20695), (12890, 16556)]