20978272

素因数分解:

$2^5\times 7^2\times {\mathrm{17}}^1\times {\mathrm{787}}^1$

素因数の和:828

約数の個数: 72

約数和(自身を含む): 50934744

約数和(自身を除く): 29956472

約数列:

[1, 2, 4, 7, 8, 14, 16, 17, 28, 32, 34, 49, 56, 68, 98, 112, 119, 136, 196, 224, 238, 272, 392, 476, 544, 784, 787, 833, 952, 1568, 1574, 1666, 1904, 3148, 3332, 3808, 5509, 6296, 6664, 11018, 12592, 13328, 13379, 22036, 25184, 26656, 26758, 38563, 44072, 53516, 77126, 88144, 93653, 107032, 154252, 176288, 187306, 214064, 308504, 374612, 428128, 617008, 655571, 749224, 1234016, 1311142, 1498448, 2622284, 2996896, 5244568, 10489136, 20978272]

約数ペア:

[(1, 20978272), (2, 10489136), (4, 5244568), (7, 2996896), (8, 2622284), (14, 1498448), (16, 1311142), (17, 1234016), (28, 749224), (32, 655571), (34, 617008), (49, 428128), (56, 374612), (68, 308504), (98, 214064), (112, 187306), (119, 176288), (136, 154252), (196, 107032), (224, 93653), (238, 88144), (272, 77126), (392, 53516), (476, 44072), (544, 38563), (784, 26758), (787, 26656), (833, 25184), (952, 22036), (1568, 13379), (1574, 13328), (1666, 12592), (1904, 11018), (3148, 6664), (3332, 6296), (3808, 5509)]