21391360

素因数分解:

$2^{11}\times 5^1\times {\mathrm{2089}}^1$

素因数の和:2116

約数の個数: 48

約数和(自身を含む): 51351300

約数和(自身を除く): 29959940

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1024, 1280, 2048, 2089, 2560, 4178, 5120, 8356, 10240, 10445, 16712, 20890, 33424, 41780, 66848, 83560, 133696, 167120, 267392, 334240, 534784, 668480, 1069568, 1336960, 2139136, 2673920, 4278272, 5347840, 10695680, 21391360]

約数ペア:

[(1, 21391360), (2, 10695680), (4, 5347840), (5, 4278272), (8, 2673920), (10, 2139136), (16, 1336960), (20, 1069568), (32, 668480), (40, 534784), (64, 334240), (80, 267392), (128, 167120), (160, 133696), (256, 83560), (320, 66848), (512, 41780), (640, 33424), (1024, 20890), (1280, 16712), (2048, 10445), (2089, 10240), (2560, 8356), (4178, 5120)]