21544784

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{131}}^1\times {\mathrm{541}}^1$

素因数の和:699

約数の個数: 40

約数和(自身を含む): 44357280

約数和(自身を除く): 22812496

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 131, 152, 262, 304, 524, 541, 1048, 1082, 2096, 2164, 2489, 4328, 4978, 8656, 9956, 10279, 19912, 20558, 39824, 41116, 70871, 82232, 141742, 164464, 283484, 566968, 1133936, 1346549, 2693098, 5386196, 10772392, 21544784]

約数ペア:

[(1, 21544784), (2, 10772392), (4, 5386196), (8, 2693098), (16, 1346549), (19, 1133936), (38, 566968), (76, 283484), (131, 164464), (152, 141742), (262, 82232), (304, 70871), (524, 41116), (541, 39824), (1048, 20558), (1082, 19912), (2096, 10279), (2164, 9956), (2489, 8656), (4328, 4978)]