21246428

素因数分解:

$2^2\times 7^1\times {\mathrm{53}}^1\times {\mathrm{103}}^1\times {\mathrm{139}}^1$

素因数の和:306

約数の個数: 48

約数和(自身を含む): 44029440

約数和(自身を除く): 22783012

約数列:

[1, 2, 4, 7, 14, 28, 53, 103, 106, 139, 206, 212, 278, 371, 412, 556, 721, 742, 973, 1442, 1484, 1946, 2884, 3892, 5459, 7367, 10918, 14317, 14734, 21836, 28634, 29468, 38213, 51569, 57268, 76426, 100219, 103138, 152852, 200438, 206276, 400876, 758801, 1517602, 3035204, 5311607, 10623214, 21246428]

約数ペア:

[(1, 21246428), (2, 10623214), (4, 5311607), (7, 3035204), (14, 1517602), (28, 758801), (53, 400876), (103, 206276), (106, 200438), (139, 152852), (206, 103138), (212, 100219), (278, 76426), (371, 57268), (412, 51569), (556, 38213), (721, 29468), (742, 28634), (973, 21836), (1442, 14734), (1484, 14317), (1946, 10918), (2884, 7367), (3892, 5459)]