21137872

素因数分解:

$2^4\times 7^1\times {\mathrm{79}}^1\times {\mathrm{2389}}^1$

素因数の和:2483

約数の個数: 40

約数和(自身を含む): 47417600

約数和(自身を除く): 26279728

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 79, 112, 158, 316, 553, 632, 1106, 1264, 2212, 2389, 4424, 4778, 8848, 9556, 16723, 19112, 33446, 38224, 66892, 133784, 188731, 267568, 377462, 754924, 1321117, 1509848, 2642234, 3019696, 5284468, 10568936, 21137872]

約数ペア:

[(1, 21137872), (2, 10568936), (4, 5284468), (7, 3019696), (8, 2642234), (14, 1509848), (16, 1321117), (28, 754924), (56, 377462), (79, 267568), (112, 188731), (158, 133784), (316, 66892), (553, 38224), (632, 33446), (1106, 19112), (1264, 16723), (2212, 9556), (2389, 8848), (4424, 4778)]