21291536

素因数分解:

$2^4\times 7^1\times {\mathrm{43}}^1\times {\mathrm{4421}}^1$

素因数の和:4479

約数の個数: 40

約数和(自身を含む): 48252864

約数和(自身を除く): 26961328

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 43, 56, 86, 112, 172, 301, 344, 602, 688, 1204, 2408, 4421, 4816, 8842, 17684, 30947, 35368, 61894, 70736, 123788, 190103, 247576, 380206, 495152, 760412, 1330721, 1520824, 2661442, 3041648, 5322884, 10645768, 21291536]

約数ペア:

[(1, 21291536), (2, 10645768), (4, 5322884), (7, 3041648), (8, 2661442), (14, 1520824), (16, 1330721), (28, 760412), (43, 495152), (56, 380206), (86, 247576), (112, 190103), (172, 123788), (301, 70736), (344, 61894), (602, 35368), (688, 30947), (1204, 17684), (2408, 8842), (4421, 4816)]