20130220

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{2473}}^1$

素因数の和:2530

約数の個数: 48

約数和(自身を含む): 47382048

約数和(自身を除く): 27251828

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 37, 44, 55, 74, 110, 148, 185, 220, 370, 407, 740, 814, 1628, 2035, 2473, 4070, 4946, 8140, 9892, 12365, 24730, 27203, 49460, 54406, 91501, 108812, 136015, 183002, 272030, 366004, 457505, 544060, 915010, 1006511, 1830020, 2013022, 4026044, 5032555, 10065110, 20130220]

約数ペア:

[(1, 20130220), (2, 10065110), (4, 5032555), (5, 4026044), (10, 2013022), (11, 1830020), (20, 1006511), (22, 915010), (37, 544060), (44, 457505), (55, 366004), (74, 272030), (110, 183002), (148, 136015), (185, 108812), (220, 91501), (370, 54406), (407, 49460), (740, 27203), (814, 24730), (1628, 12365), (2035, 9892), (2473, 8140), (4070, 4946)]