18031840

素因数分解:

$2^5\times 5^1\times {\mathrm{251}}^1\times {\mathrm{449}}^1$

素因数の和:715

約数の個数: 48

約数和(自身を含む): 42865200

約数和(自身を除く): 24833360

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 251, 449, 502, 898, 1004, 1255, 1796, 2008, 2245, 2510, 3592, 4016, 4490, 5020, 7184, 8032, 8980, 10040, 14368, 17960, 20080, 35920, 40160, 71840, 112699, 225398, 450796, 563495, 901592, 1126990, 1803184, 2253980, 3606368, 4507960, 9015920, 18031840]

約数ペア:

[(1, 18031840), (2, 9015920), (4, 4507960), (5, 3606368), (8, 2253980), (10, 1803184), (16, 1126990), (20, 901592), (32, 563495), (40, 450796), (80, 225398), (160, 112699), (251, 71840), (449, 40160), (502, 35920), (898, 20080), (1004, 17960), (1255, 14368), (1796, 10040), (2008, 8980), (2245, 8032), (2510, 7184), (3592, 5020), (4016, 4490)]