20720336

素因数分解:

$2^4\times 7^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{107}}^1$

素因数の和:161

約数の個数: 120

約数和(自身を含む): 53434080

約数和(自身を除く): 32713744

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 19, 26, 28, 38, 49, 52, 56, 76, 91, 98, 104, 107, 112, 133, 152, 182, 196, 208, 214, 247, 266, 304, 364, 392, 428, 494, 532, 637, 728, 749, 784, 856, 931, 988, 1064, 1274, 1391, 1456, 1498, 1712, 1729, 1862, 1976, 2033, 2128, 2548, 2782, 2996, 3458, 3724, 3952, 4066, 5096, 5243, 5564, 5992, 6916, 7448, 8132, 9737, 10192, 10486, 11128, 11984, 12103, 13832, 14231, 14896, 16264, 19474, 20972, 22256, 24206, 26429, 27664, 28462, 32528, 38948, 41944, 48412, 52858, 56924, 68159, 77896, 83888, 96824, 99617, 105716, 113848, 136318, 155792, 185003, 193648, 199234, 211432, 227696, 272636, 370006, 398468, 422864, 545272, 740012, 796936, 1090544, 1295021, 1480024, 1593872, 2590042, 2960048, 5180084, 10360168, 20720336]

約数ペア:

[(1, 20720336), (2, 10360168), (4, 5180084), (7, 2960048), (8, 2590042), (13, 1593872), (14, 1480024), (16, 1295021), (19, 1090544), (26, 796936), (28, 740012), (38, 545272), (49, 422864), (52, 398468), (56, 370006), (76, 272636), (91, 227696), (98, 211432), (104, 199234), (107, 193648), (112, 185003), (133, 155792), (152, 136318), (182, 113848), (196, 105716), (208, 99617), (214, 96824), (247, 83888), (266, 77896), (304, 68159), (364, 56924), (392, 52858), (428, 48412), (494, 41944), (532, 38948), (637, 32528), (728, 28462), (749, 27664), (784, 26429), (856, 24206), (931, 22256), (988, 20972), (1064, 19474), (1274, 16264), (1391, 14896), (1456, 14231), (1498, 13832), (1712, 12103), (1729, 11984), (1862, 11128), (1976, 10486), (2033, 10192), (2128, 9737), (2548, 8132), (2782, 7448), (2996, 6916), (3458, 5992), (3724, 5564), (3952, 5243), (4066, 5096)]