21662720

素因数分解:

$2^{10}\times 5^1\times {\mathrm{4231}}^1$

素因数の和:4256

約数の個数: 44

約数和(自身を含む): 51977424

約数和(自身を除く): 30314704

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1024, 1280, 2560, 4231, 5120, 8462, 16924, 21155, 33848, 42310, 67696, 84620, 135392, 169240, 270784, 338480, 541568, 676960, 1083136, 1353920, 2166272, 2707840, 4332544, 5415680, 10831360, 21662720]

約数ペア:

[(1, 21662720), (2, 10831360), (4, 5415680), (5, 4332544), (8, 2707840), (10, 2166272), (16, 1353920), (20, 1083136), (32, 676960), (40, 541568), (64, 338480), (80, 270784), (128, 169240), (160, 135392), (256, 84620), (320, 67696), (512, 42310), (640, 33848), (1024, 21155), (1280, 16924), (2560, 8462), (4231, 5120)]