19889720

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{89}}^1\times {\mathrm{151}}^1$

素因数の和:288

約数の個数: 64

約数和(自身を含む): 46785600

約数和(自身を除く): 26895880

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 74, 89, 148, 151, 178, 185, 296, 302, 356, 370, 445, 604, 712, 740, 755, 890, 1208, 1480, 1510, 1780, 3020, 3293, 3560, 5587, 6040, 6586, 11174, 13172, 13439, 16465, 22348, 26344, 26878, 27935, 32930, 44696, 53756, 55870, 65860, 67195, 107512, 111740, 131720, 134390, 223480, 268780, 497243, 537560, 994486, 1988972, 2486215, 3977944, 4972430, 9944860, 19889720]

約数ペア:

[(1, 19889720), (2, 9944860), (4, 4972430), (5, 3977944), (8, 2486215), (10, 1988972), (20, 994486), (37, 537560), (40, 497243), (74, 268780), (89, 223480), (148, 134390), (151, 131720), (178, 111740), (185, 107512), (296, 67195), (302, 65860), (356, 55870), (370, 53756), (445, 44696), (604, 32930), (712, 27935), (740, 26878), (755, 26344), (890, 22348), (1208, 16465), (1480, 13439), (1510, 13172), (1780, 11174), (3020, 6586), (3293, 6040), (3560, 5587)]