21601480

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{661}}^1$

素因数の和:734

約数の個数: 64

約数和(自身を含む): 52430400

約数和(自身を除く): 30828920

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 43, 76, 86, 95, 152, 172, 190, 215, 344, 380, 430, 661, 760, 817, 860, 1322, 1634, 1720, 2644, 3268, 3305, 4085, 5288, 6536, 6610, 8170, 12559, 13220, 16340, 25118, 26440, 28423, 32680, 50236, 56846, 62795, 100472, 113692, 125590, 142115, 227384, 251180, 284230, 502360, 540037, 568460, 1080074, 1136920, 2160148, 2700185, 4320296, 5400370, 10800740, 21601480]

約数ペア:

[(1, 21601480), (2, 10800740), (4, 5400370), (5, 4320296), (8, 2700185), (10, 2160148), (19, 1136920), (20, 1080074), (38, 568460), (40, 540037), (43, 502360), (76, 284230), (86, 251180), (95, 227384), (152, 142115), (172, 125590), (190, 113692), (215, 100472), (344, 62795), (380, 56846), (430, 50236), (661, 32680), (760, 28423), (817, 26440), (860, 25118), (1322, 16340), (1634, 13220), (1720, 12559), (2644, 8170), (3268, 6610), (3305, 6536), (4085, 5288)]