20579020

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{83}}^1$

素因数の和:140

約数の個数: 144

約数和(自身を含む): 57915648

約数和(自身を除く): 37336628

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 23, 28, 35, 44, 46, 49, 55, 70, 77, 83, 92, 98, 110, 115, 140, 154, 161, 166, 196, 220, 230, 245, 253, 308, 322, 332, 385, 415, 460, 490, 506, 539, 581, 644, 770, 805, 830, 913, 980, 1012, 1078, 1127, 1162, 1265, 1540, 1610, 1660, 1771, 1826, 1909, 2156, 2254, 2324, 2530, 2695, 2905, 3220, 3542, 3652, 3818, 4067, 4508, 4565, 5060, 5390, 5635, 5810, 6391, 7084, 7636, 8134, 8855, 9130, 9545, 10780, 11270, 11620, 12397, 12782, 13363, 16268, 17710, 18260, 19090, 20335, 20999, 22540, 24794, 25564, 26726, 31955, 35420, 38180, 40670, 41998, 44737, 49588, 53452, 61985, 63910, 66815, 81340, 83996, 89474, 93541, 104995, 123970, 127820, 133630, 146993, 178948, 187082, 209990, 223685, 247940, 267260, 293986, 374164, 419980, 447370, 467705, 587972, 734965, 894740, 935410, 1028951, 1469930, 1870820, 2057902, 2939860, 4115804, 5144755, 10289510, 20579020]

約数ペア:

[(1, 20579020), (2, 10289510), (4, 5144755), (5, 4115804), (7, 2939860), (10, 2057902), (11, 1870820), (14, 1469930), (20, 1028951), (22, 935410), (23, 894740), (28, 734965), (35, 587972), (44, 467705), (46, 447370), (49, 419980), (55, 374164), (70, 293986), (77, 267260), (83, 247940), (92, 223685), (98, 209990), (110, 187082), (115, 178948), (140, 146993), (154, 133630), (161, 127820), (166, 123970), (196, 104995), (220, 93541), (230, 89474), (245, 83996), (253, 81340), (308, 66815), (322, 63910), (332, 61985), (385, 53452), (415, 49588), (460, 44737), (490, 41998), (506, 40670), (539, 38180), (581, 35420), (644, 31955), (770, 26726), (805, 25564), (830, 24794), (913, 22540), (980, 20999), (1012, 20335), (1078, 19090), (1127, 18260), (1162, 17710), (1265, 16268), (1540, 13363), (1610, 12782), (1660, 12397), (1771, 11620), (1826, 11270), (1909, 10780), (2156, 9545), (2254, 9130), (2324, 8855), (2530, 8134), (2695, 7636), (2905, 7084), (3220, 6391), (3542, 5810), (3652, 5635), (3818, 5390), (4067, 5060), (4508, 4565)]