20680040

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{89}}^1\times {\mathrm{157}}^1$

素因数の和:294

約数の個数: 64

約数和(自身を含む): 48632400

約数和(自身を除く): 27952360

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 74, 89, 148, 157, 178, 185, 296, 314, 356, 370, 445, 628, 712, 740, 785, 890, 1256, 1480, 1570, 1780, 3140, 3293, 3560, 5809, 6280, 6586, 11618, 13172, 13973, 16465, 23236, 26344, 27946, 29045, 32930, 46472, 55892, 58090, 65860, 69865, 111784, 116180, 131720, 139730, 232360, 279460, 517001, 558920, 1034002, 2068004, 2585005, 4136008, 5170010, 10340020, 20680040]

約数ペア:

[(1, 20680040), (2, 10340020), (4, 5170010), (5, 4136008), (8, 2585005), (10, 2068004), (20, 1034002), (37, 558920), (40, 517001), (74, 279460), (89, 232360), (148, 139730), (157, 131720), (178, 116180), (185, 111784), (296, 69865), (314, 65860), (356, 58090), (370, 55892), (445, 46472), (628, 32930), (712, 29045), (740, 27946), (785, 26344), (890, 23236), (1256, 16465), (1480, 13973), (1570, 13172), (1780, 11618), (3140, 6586), (3293, 6280), (3560, 5809)]