21663580

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{41}}^1\times {\mathrm{911}}^1$

素因数の和:990

約数の個数: 48

約数和(自身を含む): 48263040

約数和(自身を除く): 26599460

約数列:

[1, 2, 4, 5, 10, 20, 29, 41, 58, 82, 116, 145, 164, 205, 290, 410, 580, 820, 911, 1189, 1822, 2378, 3644, 4555, 4756, 5945, 9110, 11890, 18220, 23780, 26419, 37351, 52838, 74702, 105676, 132095, 149404, 186755, 264190, 373510, 528380, 747020, 1083179, 2166358, 4332716, 5415895, 10831790, 21663580]

約数ペア:

[(1, 21663580), (2, 10831790), (4, 5415895), (5, 4332716), (10, 2166358), (20, 1083179), (29, 747020), (41, 528380), (58, 373510), (82, 264190), (116, 186755), (145, 149404), (164, 132095), (205, 105676), (290, 74702), (410, 52838), (580, 37351), (820, 26419), (911, 23780), (1189, 18220), (1822, 11890), (2378, 9110), (3644, 5945), (4555, 4756)]