21465040

素因数分解:

$2^4\times 5^1\times {\mathrm{157}}^1\times {\mathrm{1709}}^1$

素因数の和:1879

約数の個数: 40

約数和(自身を含む): 50253480

約数和(自身を除く): 28788440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 157, 314, 628, 785, 1256, 1570, 1709, 2512, 3140, 3418, 6280, 6836, 8545, 12560, 13672, 17090, 27344, 34180, 68360, 136720, 268313, 536626, 1073252, 1341565, 2146504, 2683130, 4293008, 5366260, 10732520, 21465040]

約数ペア:

[(1, 21465040), (2, 10732520), (4, 5366260), (5, 4293008), (8, 2683130), (10, 2146504), (16, 1341565), (20, 1073252), (40, 536626), (80, 268313), (157, 136720), (314, 68360), (628, 34180), (785, 27344), (1256, 17090), (1570, 13672), (1709, 12560), (2512, 8545), (3140, 6836), (3418, 6280)]