19899999

素因数分解:

$3^5\times 7^1\times {\mathrm{11699}}^1$

素因数の和:11721

約数の個数: 24

約数和(自身を含む): 34070400

約数和(自身を除く): 14170401

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 243, 567, 1701, 11699, 35097, 81893, 105291, 245679, 315873, 737037, 947619, 2211111, 2842857, 6633333, 19899999]

約数ペア:

[(1, 19899999), (3, 6633333), (7, 2842857), (9, 2211111), (21, 947619), (27, 737037), (63, 315873), (81, 245679), (189, 105291), (243, 81893), (567, 35097), (1701, 11699)]