21653872

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{149}}^1\times {\mathrm{293}}^1$

素因数の和:481

約数の個数: 40

約数和(自身を含む): 43747200

約数和(自身を除く): 22093328

約数列:

[1, 2, 4, 8, 16, 31, 62, 124, 149, 248, 293, 298, 496, 586, 596, 1172, 1192, 2344, 2384, 4619, 4688, 9083, 9238, 18166, 18476, 36332, 36952, 43657, 72664, 73904, 87314, 145328, 174628, 349256, 698512, 1353367, 2706734, 5413468, 10826936, 21653872]

約数ペア:

[(1, 21653872), (2, 10826936), (4, 5413468), (8, 2706734), (16, 1353367), (31, 698512), (62, 349256), (124, 174628), (149, 145328), (248, 87314), (293, 73904), (298, 72664), (496, 43657), (586, 36952), (596, 36332), (1172, 18476), (1192, 18166), (2344, 9238), (2384, 9083), (4619, 4688)]