20779220

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{103}}^1\times {\mathrm{131}}^1$

素因数の和:261

約数の個数: 96

約数和(自身を含む): 55351296

約数和(自身を除く): 34572076

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 103, 110, 131, 140, 154, 206, 220, 262, 308, 385, 412, 515, 524, 655, 721, 770, 917, 1030, 1133, 1310, 1441, 1442, 1540, 1834, 2060, 2266, 2620, 2882, 2884, 3605, 3668, 4532, 4585, 5665, 5764, 7205, 7210, 7931, 9170, 10087, 11330, 13493, 14410, 14420, 15862, 18340, 20174, 22660, 26986, 28820, 31724, 39655, 40348, 50435, 53972, 67465, 79310, 94451, 100870, 134930, 148423, 158620, 188902, 201740, 269860, 296846, 377804, 472255, 593692, 742115, 944510, 1038961, 1484230, 1889020, 2077922, 2968460, 4155844, 5194805, 10389610, 20779220]

約数ペア:

[(1, 20779220), (2, 10389610), (4, 5194805), (5, 4155844), (7, 2968460), (10, 2077922), (11, 1889020), (14, 1484230), (20, 1038961), (22, 944510), (28, 742115), (35, 593692), (44, 472255), (55, 377804), (70, 296846), (77, 269860), (103, 201740), (110, 188902), (131, 158620), (140, 148423), (154, 134930), (206, 100870), (220, 94451), (262, 79310), (308, 67465), (385, 53972), (412, 50435), (515, 40348), (524, 39655), (655, 31724), (721, 28820), (770, 26986), (917, 22660), (1030, 20174), (1133, 18340), (1310, 15862), (1441, 14420), (1442, 14410), (1540, 13493), (1834, 11330), (2060, 10087), (2266, 9170), (2620, 7931), (2882, 7210), (2884, 7205), (3605, 5764), (3668, 5665), (4532, 4585)]