21402280

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{14461}}^1$

素因数の和:14509

約数の個数: 32

約数和(自身を含む): 49460040

約数和(自身を除く): 28057760

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 74, 148, 185, 296, 370, 740, 1480, 14461, 28922, 57844, 72305, 115688, 144610, 289220, 535057, 578440, 1070114, 2140228, 2675285, 4280456, 5350570, 10701140, 21402280]

約数ペア:

[(1, 21402280), (2, 10701140), (4, 5350570), (5, 4280456), (8, 2675285), (10, 2140228), (20, 1070114), (37, 578440), (40, 535057), (74, 289220), (148, 144610), (185, 115688), (296, 72305), (370, 57844), (740, 28922), (1480, 14461)]