21901540

素因数分解:

$2^2\times 5^1\times {\mathrm{257}}^1\times {\mathrm{4261}}^1$

素因数の和:4527

約数の個数: 24

約数和(自身を含む): 46183032

約数和(自身を除く): 24281492

約数列:

[1, 2, 4, 5, 10, 20, 257, 514, 1028, 1285, 2570, 4261, 5140, 8522, 17044, 21305, 42610, 85220, 1095077, 2190154, 4380308, 5475385, 10950770, 21901540]

約数ペア:

[(1, 21901540), (2, 10950770), (4, 5475385), (5, 4380308), (10, 2190154), (20, 1095077), (257, 85220), (514, 42610), (1028, 21305), (1285, 17044), (2570, 8522), (4261, 5140)]