21187816

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{4969}}^1$

素因数の和:5029

約数の個数: 32

約数和(自身を含む): 43835400

約数和(自身を除く): 22647584

約数列:

[1, 2, 4, 8, 13, 26, 41, 52, 82, 104, 164, 328, 533, 1066, 2132, 4264, 4969, 9938, 19876, 39752, 64597, 129194, 203729, 258388, 407458, 516776, 814916, 1629832, 2648477, 5296954, 10593908, 21187816]

約数ペア:

[(1, 21187816), (2, 10593908), (4, 5296954), (8, 2648477), (13, 1629832), (26, 814916), (41, 516776), (52, 407458), (82, 258388), (104, 203729), (164, 129194), (328, 64597), (533, 39752), (1066, 19876), (2132, 9938), (4264, 4969)]