21780816

素因数分解:

$2^4\times 3^1\times {\mathrm{23}}^1\times {\mathrm{109}}^1\times {\mathrm{181}}^1$

素因数の和:324

約数の個数: 80

約数和(自身を含む): 59579520

約数和(自身を除く): 37798704

約数列:

[1, 2, 3, 4, 6, 8, 12, 16, 23, 24, 46, 48, 69, 92, 109, 138, 181, 184, 218, 276, 327, 362, 368, 436, 543, 552, 654, 724, 872, 1086, 1104, 1308, 1448, 1744, 2172, 2507, 2616, 2896, 4163, 4344, 5014, 5232, 7521, 8326, 8688, 10028, 12489, 15042, 16652, 19729, 20056, 24978, 30084, 33304, 39458, 40112, 49956, 59187, 60168, 66608, 78916, 99912, 118374, 120336, 157832, 199824, 236748, 315664, 453767, 473496, 907534, 946992, 1361301, 1815068, 2722602, 3630136, 5445204, 7260272, 10890408, 21780816]

約数ペア:

[(1, 21780816), (2, 10890408), (3, 7260272), (4, 5445204), (6, 3630136), (8, 2722602), (12, 1815068), (16, 1361301), (23, 946992), (24, 907534), (46, 473496), (48, 453767), (69, 315664), (92, 236748), (109, 199824), (138, 157832), (181, 120336), (184, 118374), (218, 99912), (276, 78916), (327, 66608), (362, 60168), (368, 59187), (436, 49956), (543, 40112), (552, 39458), (654, 33304), (724, 30084), (872, 24978), (1086, 20056), (1104, 19729), (1308, 16652), (1448, 15042), (1744, 12489), (2172, 10028), (2507, 8688), (2616, 8326), (2896, 7521), (4163, 5232), (4344, 5014)]