21591904

素因数分解:

$2^5\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{2089}}^1$

素因数の和:2135

約数の個数: 48

約数和(自身を含む): 47401200

約数和(自身を除く): 25809296

約数列:

[1, 2, 4, 8, 16, 17, 19, 32, 34, 38, 68, 76, 136, 152, 272, 304, 323, 544, 608, 646, 1292, 2089, 2584, 4178, 5168, 8356, 10336, 16712, 33424, 35513, 39691, 66848, 71026, 79382, 142052, 158764, 284104, 317528, 568208, 635056, 674747, 1136416, 1270112, 1349494, 2698988, 5397976, 10795952, 21591904]

約数ペア:

[(1, 21591904), (2, 10795952), (4, 5397976), (8, 2698988), (16, 1349494), (17, 1270112), (19, 1136416), (32, 674747), (34, 635056), (38, 568208), (68, 317528), (76, 284104), (136, 158764), (152, 142052), (272, 79382), (304, 71026), (323, 66848), (544, 39691), (608, 35513), (646, 33424), (1292, 16712), (2089, 10336), (2584, 8356), (4178, 5168)]