21487784

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{373}}^1\times {\mathrm{379}}^1$

素因数の和:777

約数の個数: 32

約数和(自身を含む): 42636000

約数和(自身を除く): 21148216

約数列:

[1, 2, 4, 8, 19, 38, 76, 152, 373, 379, 746, 758, 1492, 1516, 2984, 3032, 7087, 7201, 14174, 14402, 28348, 28804, 56696, 57608, 141367, 282734, 565468, 1130936, 2685973, 5371946, 10743892, 21487784]

約数ペア:

[(1, 21487784), (2, 10743892), (4, 5371946), (8, 2685973), (19, 1130936), (38, 565468), (76, 282734), (152, 141367), (373, 57608), (379, 56696), (746, 28804), (758, 28348), (1492, 14402), (1516, 14174), (2984, 7201), (3032, 7087)]