21980464

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{1759}}^1$

素因数の和:1849

約数の個数: 40

約数和(自身を含む): 47139840

約数和(自身を除く): 25159376

約数列:

[1, 2, 4, 8, 11, 16, 22, 44, 71, 88, 142, 176, 284, 568, 781, 1136, 1562, 1759, 3124, 3518, 6248, 7036, 12496, 14072, 19349, 28144, 38698, 77396, 124889, 154792, 249778, 309584, 499556, 999112, 1373779, 1998224, 2747558, 5495116, 10990232, 21980464]

約数ペア:

[(1, 21980464), (2, 10990232), (4, 5495116), (8, 2747558), (11, 1998224), (16, 1373779), (22, 999112), (44, 499556), (71, 309584), (88, 249778), (142, 154792), (176, 124889), (284, 77396), (568, 38698), (781, 28144), (1136, 19349), (1562, 14072), (1759, 12496), (3124, 7036), (3518, 6248)]