21301904

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{2179}}^1$

素因数の和:2247

約数の個数: 40

約数和(自身を含む): 45413760

約数和(自身を除く): 24111856

約数列:

[1, 2, 4, 8, 13, 16, 26, 47, 52, 94, 104, 188, 208, 376, 611, 752, 1222, 2179, 2444, 4358, 4888, 8716, 9776, 17432, 28327, 34864, 56654, 102413, 113308, 204826, 226616, 409652, 453232, 819304, 1331369, 1638608, 2662738, 5325476, 10650952, 21301904]

約数ペア:

[(1, 21301904), (2, 10650952), (4, 5325476), (8, 2662738), (13, 1638608), (16, 1331369), (26, 819304), (47, 453232), (52, 409652), (94, 226616), (104, 204826), (188, 113308), (208, 102413), (376, 56654), (611, 34864), (752, 28327), (1222, 17432), (2179, 9776), (2444, 8716), (4358, 4888)]