20402620

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{109}}^1\times {\mathrm{191}}^1$

素因数の和:323

約数の個数: 72

約数和(自身を含む): 50561280

約数和(自身を除く): 30158660

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 109, 140, 191, 196, 218, 245, 382, 436, 490, 545, 763, 764, 955, 980, 1090, 1337, 1526, 1910, 2180, 2674, 3052, 3815, 3820, 5341, 5348, 6685, 7630, 9359, 10682, 13370, 15260, 18718, 20819, 21364, 26705, 26740, 37436, 41638, 46795, 53410, 83276, 93590, 104095, 106820, 145733, 187180, 208190, 291466, 416380, 582932, 728665, 1020131, 1457330, 2040262, 2914660, 4080524, 5100655, 10201310, 20402620]

約数ペア:

[(1, 20402620), (2, 10201310), (4, 5100655), (5, 4080524), (7, 2914660), (10, 2040262), (14, 1457330), (20, 1020131), (28, 728665), (35, 582932), (49, 416380), (70, 291466), (98, 208190), (109, 187180), (140, 145733), (191, 106820), (196, 104095), (218, 93590), (245, 83276), (382, 53410), (436, 46795), (490, 41638), (545, 37436), (763, 26740), (764, 26705), (955, 21364), (980, 20819), (1090, 18718), (1337, 15260), (1526, 13370), (1910, 10682), (2180, 9359), (2674, 7630), (3052, 6685), (3815, 5348), (3820, 5341)]