19978784

素因数分解:

$2^5\times 7^1\times {\mathrm{79}}^1\times {\mathrm{1129}}^1$

素因数の和:1225

約数の個数: 48

約数和(自身を含む): 45561600

約数和(自身を除く): 25582816

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 56, 79, 112, 158, 224, 316, 553, 632, 1106, 1129, 1264, 2212, 2258, 2528, 4424, 4516, 7903, 8848, 9032, 15806, 17696, 18064, 31612, 36128, 63224, 89191, 126448, 178382, 252896, 356764, 624337, 713528, 1248674, 1427056, 2497348, 2854112, 4994696, 9989392, 19978784]

約数ペア:

[(1, 19978784), (2, 9989392), (4, 4994696), (7, 2854112), (8, 2497348), (14, 1427056), (16, 1248674), (28, 713528), (32, 624337), (56, 356764), (79, 252896), (112, 178382), (158, 126448), (224, 89191), (316, 63224), (553, 36128), (632, 31612), (1106, 18064), (1129, 17696), (1264, 15806), (2212, 9032), (2258, 8848), (2528, 7903), (4424, 4516)]