21719584

素因数分解:

$2^5\times {\mathrm{19}}^1\times {\mathrm{139}}^1\times {\mathrm{257}}^1$

素因数の和:425

約数の個数: 48

約数和(自身を含む): 45511200

約数和(自身を除く): 23791616

約数列:

[1, 2, 4, 8, 16, 19, 32, 38, 76, 139, 152, 257, 278, 304, 514, 556, 608, 1028, 1112, 2056, 2224, 2641, 4112, 4448, 4883, 5282, 8224, 9766, 10564, 19532, 21128, 35723, 39064, 42256, 71446, 78128, 84512, 142892, 156256, 285784, 571568, 678737, 1143136, 1357474, 2714948, 5429896, 10859792, 21719584]

約数ペア:

[(1, 21719584), (2, 10859792), (4, 5429896), (8, 2714948), (16, 1357474), (19, 1143136), (32, 678737), (38, 571568), (76, 285784), (139, 156256), (152, 142892), (257, 84512), (278, 78128), (304, 71446), (514, 42256), (556, 39064), (608, 35723), (1028, 21128), (1112, 19532), (2056, 10564), (2224, 9766), (2641, 8224), (4112, 5282), (4448, 4883)]