20198320

素因数分解:

$2^4\times 5^1\times {\mathrm{61}}^1\times {\mathrm{4139}}^1$

素因数の和:4213

約数の個数: 40

約数和(自身を含む): 47742480

約数和(自身を除く): 27544160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 61, 80, 122, 244, 305, 488, 610, 976, 1220, 2440, 4139, 4880, 8278, 16556, 20695, 33112, 41390, 66224, 82780, 165560, 252479, 331120, 504958, 1009916, 1262395, 2019832, 2524790, 4039664, 5049580, 10099160, 20198320]

約数ペア:

[(1, 20198320), (2, 10099160), (4, 5049580), (5, 4039664), (8, 2524790), (10, 2019832), (16, 1262395), (20, 1009916), (40, 504958), (61, 331120), (80, 252479), (122, 165560), (244, 82780), (305, 66224), (488, 41390), (610, 33112), (976, 20695), (1220, 16556), (2440, 8278), (4139, 4880)]