28280980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{379}}^1$

素因数の和:449

約数の個数: 96

約数和(自身を含む): 75075840

約数和(自身を除く): 46794860

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 41, 52, 65, 70, 82, 91, 130, 140, 164, 182, 205, 260, 287, 364, 379, 410, 455, 533, 574, 758, 820, 910, 1066, 1148, 1435, 1516, 1820, 1895, 2132, 2653, 2665, 2870, 3731, 3790, 4927, 5306, 5330, 5740, 7462, 7580, 9854, 10612, 10660, 13265, 14924, 15539, 18655, 19708, 24635, 26530, 31078, 34489, 37310, 49270, 53060, 62156, 68978, 74620, 77695, 98540, 108773, 137956, 155390, 172445, 202007, 217546, 310780, 344890, 404014, 435092, 543865, 689780, 808028, 1010035, 1087730, 1414049, 2020070, 2175460, 2828098, 4040140, 5656196, 7070245, 14140490, 28280980]

約数ペア:

[(1, 28280980), (2, 14140490), (4, 7070245), (5, 5656196), (7, 4040140), (10, 2828098), (13, 2175460), (14, 2020070), (20, 1414049), (26, 1087730), (28, 1010035), (35, 808028), (41, 689780), (52, 543865), (65, 435092), (70, 404014), (82, 344890), (91, 310780), (130, 217546), (140, 202007), (164, 172445), (182, 155390), (205, 137956), (260, 108773), (287, 98540), (364, 77695), (379, 74620), (410, 68978), (455, 62156), (533, 53060), (574, 49270), (758, 37310), (820, 34489), (910, 31078), (1066, 26530), (1148, 24635), (1435, 19708), (1516, 18655), (1820, 15539), (1895, 14924), (2132, 13265), (2653, 10660), (2665, 10612), (2870, 9854), (3731, 7580), (3790, 7462), (4927, 5740), (5306, 5330)]