21238784

素因数分解:

$2^{10}\times 7^1\times {\mathrm{2963}}^1$

素因数の和:2990

約数の個数: 44

約数和(自身を含む): 48538464

約数和(自身を除く): 27299680

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 56, 64, 112, 128, 224, 256, 448, 512, 896, 1024, 1792, 2963, 3584, 5926, 7168, 11852, 20741, 23704, 41482, 47408, 82964, 94816, 165928, 189632, 331856, 379264, 663712, 758528, 1327424, 1517056, 2654848, 3034112, 5309696, 10619392, 21238784]

約数ペア:

[(1, 21238784), (2, 10619392), (4, 5309696), (7, 3034112), (8, 2654848), (14, 1517056), (16, 1327424), (28, 758528), (32, 663712), (56, 379264), (64, 331856), (112, 189632), (128, 165928), (224, 94816), (256, 82964), (448, 47408), (512, 41482), (896, 23704), (1024, 20741), (1792, 11852), (2963, 7168), (3584, 5926)]