21009056

素因数分解:

$2^5\times {\mathrm{41}}^1\times {\mathrm{67}}^1\times {\mathrm{239}}^1$

素因数の和:357

約数の個数: 48

約数和(自身を含む): 43182720

約数和(自身を除く): 22173664

約数列:

[1, 2, 4, 8, 16, 32, 41, 67, 82, 134, 164, 239, 268, 328, 478, 536, 656, 956, 1072, 1312, 1912, 2144, 2747, 3824, 5494, 7648, 9799, 10988, 16013, 19598, 21976, 32026, 39196, 43952, 64052, 78392, 87904, 128104, 156784, 256208, 313568, 512416, 656533, 1313066, 2626132, 5252264, 10504528, 21009056]

約数ペア:

[(1, 21009056), (2, 10504528), (4, 5252264), (8, 2626132), (16, 1313066), (32, 656533), (41, 512416), (67, 313568), (82, 256208), (134, 156784), (164, 128104), (239, 87904), (268, 78392), (328, 64052), (478, 43952), (536, 39196), (656, 32026), (956, 21976), (1072, 19598), (1312, 16013), (1912, 10988), (2144, 9799), (2747, 7648), (3824, 5494)]