18749720

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{991}}^1$

素因数の和:1056

約数の個数: 64

約数和(自身を含む): 47139840

約数和(自身を除く): 28390120

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 43, 44, 55, 86, 88, 110, 172, 215, 220, 344, 430, 440, 473, 860, 946, 991, 1720, 1892, 1982, 2365, 3784, 3964, 4730, 4955, 7928, 9460, 9910, 10901, 18920, 19820, 21802, 39640, 42613, 43604, 54505, 85226, 87208, 109010, 170452, 213065, 218020, 340904, 426130, 436040, 468743, 852260, 937486, 1704520, 1874972, 2343715, 3749944, 4687430, 9374860, 18749720]

約数ペア:

[(1, 18749720), (2, 9374860), (4, 4687430), (5, 3749944), (8, 2343715), (10, 1874972), (11, 1704520), (20, 937486), (22, 852260), (40, 468743), (43, 436040), (44, 426130), (55, 340904), (86, 218020), (88, 213065), (110, 170452), (172, 109010), (215, 87208), (220, 85226), (344, 54505), (430, 43604), (440, 42613), (473, 39640), (860, 21802), (946, 19820), (991, 18920), (1720, 10901), (1892, 9910), (1982, 9460), (2365, 7928), (3784, 4955), (3964, 4730)]