21621951

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{229}}^1\times {\mathrm{269}}^1$

素因数の和:520

約数の個数: 32

約数和(自身を含む): 34776000

約数和(自身を除く): 13154049

約数列:

[1, 3, 9, 13, 27, 39, 117, 229, 269, 351, 687, 807, 2061, 2421, 2977, 3497, 6183, 7263, 8931, 10491, 26793, 31473, 61601, 80379, 94419, 184803, 554409, 800813, 1663227, 2402439, 7207317, 21621951]

約数ペア:

[(1, 21621951), (3, 7207317), (9, 2402439), (13, 1663227), (27, 800813), (39, 554409), (117, 184803), (229, 94419), (269, 80379), (351, 61601), (687, 31473), (807, 26793), (2061, 10491), (2421, 8931), (2977, 7263), (3497, 6183)]