20917280

素因数分解:

$2^5\times 5^1\times {\mathrm{239}}^1\times {\mathrm{547}}^1$

素因数の和:801

約数の個数: 48

約数和(自身を含む): 49714560

約数和(自身を除く): 28797280

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 239, 478, 547, 956, 1094, 1195, 1912, 2188, 2390, 2735, 3824, 4376, 4780, 5470, 7648, 8752, 9560, 10940, 17504, 19120, 21880, 38240, 43760, 87520, 130733, 261466, 522932, 653665, 1045864, 1307330, 2091728, 2614660, 4183456, 5229320, 10458640, 20917280]

約数ペア:

[(1, 20917280), (2, 10458640), (4, 5229320), (5, 4183456), (8, 2614660), (10, 2091728), (16, 1307330), (20, 1045864), (32, 653665), (40, 522932), (80, 261466), (160, 130733), (239, 87520), (478, 43760), (547, 38240), (956, 21880), (1094, 19120), (1195, 17504), (1912, 10940), (2188, 9560), (2390, 8752), (2735, 7648), (3824, 5470), (4376, 4780)]