20333840

素因数分解:

$2^4\times 5^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{257}}^1$

素因数の和:336

約数の個数: 80

約数和(自身を含む): 50675328

約数和(自身を除く): 30341488

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 40, 43, 46, 80, 86, 92, 115, 172, 184, 215, 230, 257, 344, 368, 430, 460, 514, 688, 860, 920, 989, 1028, 1285, 1720, 1840, 1978, 2056, 2570, 3440, 3956, 4112, 4945, 5140, 5911, 7912, 9890, 10280, 11051, 11822, 15824, 19780, 20560, 22102, 23644, 29555, 39560, 44204, 47288, 55255, 59110, 79120, 88408, 94576, 110510, 118220, 176816, 221020, 236440, 254173, 442040, 472880, 508346, 884080, 1016692, 1270865, 2033384, 2541730, 4066768, 5083460, 10166920, 20333840]

約数ペア:

[(1, 20333840), (2, 10166920), (4, 5083460), (5, 4066768), (8, 2541730), (10, 2033384), (16, 1270865), (20, 1016692), (23, 884080), (40, 508346), (43, 472880), (46, 442040), (80, 254173), (86, 236440), (92, 221020), (115, 176816), (172, 118220), (184, 110510), (215, 94576), (230, 88408), (257, 79120), (344, 59110), (368, 55255), (430, 47288), (460, 44204), (514, 39560), (688, 29555), (860, 23644), (920, 22102), (989, 20560), (1028, 19780), (1285, 15824), (1720, 11822), (1840, 11051), (1978, 10280), (2056, 9890), (2570, 7912), (3440, 5911), (3956, 5140), (4112, 4945)]