21404050

素因数分解:

$2^1\times 5^2\times {\mathrm{41}}^1\times {\mathrm{53}}^1\times {\mathrm{197}}^1$

素因数の和:303

約数の個数: 48

約数和(自身を含む): 41762952

約数和(自身を除く): 20358902

約数列:

[1, 2, 5, 10, 25, 41, 50, 53, 82, 106, 197, 205, 265, 394, 410, 530, 985, 1025, 1325, 1970, 2050, 2173, 2650, 4346, 4925, 8077, 9850, 10441, 10865, 16154, 20882, 21730, 40385, 52205, 54325, 80770, 104410, 108650, 201925, 261025, 403850, 428081, 522050, 856162, 2140405, 4280810, 10702025, 21404050]

約数ペア:

[(1, 21404050), (2, 10702025), (5, 4280810), (10, 2140405), (25, 856162), (41, 522050), (50, 428081), (53, 403850), (82, 261025), (106, 201925), (197, 108650), (205, 104410), (265, 80770), (394, 54325), (410, 52205), (530, 40385), (985, 21730), (1025, 20882), (1325, 16154), (1970, 10865), (2050, 10441), (2173, 9850), (2650, 8077), (4346, 4925)]