21000655179

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{101}}^1\times {\mathrm{173707}}^1$

素因数の和:173840

約数の個数: 48

約数和(自身を含む): 36853889280

約数和(自身を除く): 15853234101

約数列:

[1, 3, 7, 9, 19, 21, 57, 63, 101, 133, 171, 303, 399, 707, 909, 1197, 1919, 2121, 5757, 6363, 13433, 17271, 40299, 120897, 173707, 521121, 1215949, 1563363, 3300433, 3647847, 9901299, 10943541, 17544407, 23103031, 29703897, 52633221, 69309093, 122810849, 157899663, 207927279, 333343733, 368432547, 1000031199, 1105297641, 2333406131, 3000093597, 7000218393, 21000655179]

約数ペア:

[(1, 21000655179), (3, 7000218393), (7, 3000093597), (9, 2333406131), (19, 1105297641), (21, 1000031199), (57, 368432547), (63, 333343733), (101, 207927279), (133, 157899663), (171, 122810849), (303, 69309093), (399, 52633221), (707, 29703897), (909, 23103031), (1197, 17544407), (1919, 10943541), (2121, 9901299), (5757, 3647847), (6363, 3300433), (13433, 1563363), (17271, 1215949), (40299, 521121), (120897, 173707)]