28297520

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{20807}}^1$

素因数の和:20837

約数の個数: 40

約数和(自身を含む): 69665184

約数和(自身を除く): 41367664

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 340, 680, 1360, 20807, 41614, 83228, 104035, 166456, 208070, 332912, 353719, 416140, 707438, 832280, 1414876, 1664560, 1768595, 2829752, 3537190, 5659504, 7074380, 14148760, 28297520]

約数ペア:

[(1, 28297520), (2, 14148760), (4, 7074380), (5, 5659504), (8, 3537190), (10, 2829752), (16, 1768595), (17, 1664560), (20, 1414876), (34, 832280), (40, 707438), (68, 416140), (80, 353719), (85, 332912), (136, 208070), (170, 166456), (272, 104035), (340, 83228), (680, 41614), (1360, 20807)]