20867728

素因数分解:

$2^4\times 7^2\times {\mathrm{43}}^1\times {\mathrm{619}}^1$

素因数の和:684

約数の個数: 60

約数和(自身を含む): 48203760

約数和(自身を除く): 27336032

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 43, 49, 56, 86, 98, 112, 172, 196, 301, 344, 392, 602, 619, 688, 784, 1204, 1238, 2107, 2408, 2476, 4214, 4333, 4816, 4952, 8428, 8666, 9904, 16856, 17332, 26617, 30331, 33712, 34664, 53234, 60662, 69328, 106468, 121324, 186319, 212936, 242648, 372638, 425872, 485296, 745276, 1304233, 1490552, 2608466, 2981104, 5216932, 10433864, 20867728]

約数ペア:

[(1, 20867728), (2, 10433864), (4, 5216932), (7, 2981104), (8, 2608466), (14, 1490552), (16, 1304233), (28, 745276), (43, 485296), (49, 425872), (56, 372638), (86, 242648), (98, 212936), (112, 186319), (172, 121324), (196, 106468), (301, 69328), (344, 60662), (392, 53234), (602, 34664), (619, 33712), (688, 30331), (784, 26617), (1204, 17332), (1238, 16856), (2107, 9904), (2408, 8666), (2476, 8428), (4214, 4952), (4333, 4816)]