21212416

素因数分解:

$2^8\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1$

素因数の和:147

約数の個数: 72

約数和(自身を含む): 45327744

約数和(自身を除く): 24115328

約数列:

[1, 2, 4, 8, 16, 32, 41, 43, 47, 64, 82, 86, 94, 128, 164, 172, 188, 256, 328, 344, 376, 656, 688, 752, 1312, 1376, 1504, 1763, 1927, 2021, 2624, 2752, 3008, 3526, 3854, 4042, 5248, 5504, 6016, 7052, 7708, 8084, 10496, 11008, 12032, 14104, 15416, 16168, 28208, 30832, 32336, 56416, 61664, 64672, 82861, 112832, 123328, 129344, 165722, 225664, 246656, 258688, 331444, 451328, 493312, 517376, 662888, 1325776, 2651552, 5303104, 10606208, 21212416]

約数ペア:

[(1, 21212416), (2, 10606208), (4, 5303104), (8, 2651552), (16, 1325776), (32, 662888), (41, 517376), (43, 493312), (47, 451328), (64, 331444), (82, 258688), (86, 246656), (94, 225664), (128, 165722), (164, 129344), (172, 123328), (188, 112832), (256, 82861), (328, 64672), (344, 61664), (376, 56416), (656, 32336), (688, 30832), (752, 28208), (1312, 16168), (1376, 15416), (1504, 14104), (1763, 12032), (1927, 11008), (2021, 10496), (2624, 8084), (2752, 7708), (3008, 7052), (3526, 6016), (3854, 5504), (4042, 5248)]