21012008

素因数分解:

$2^3\times {\mathrm{29}}^1\times {\mathrm{41}}^1\times {\mathrm{47}}^2$

素因数の和:170

約数の個数: 48

約数和(自身を含む): 42657300

約数和(自身を除く): 21645292

約数列:

[1, 2, 4, 8, 29, 41, 47, 58, 82, 94, 116, 164, 188, 232, 328, 376, 1189, 1363, 1927, 2209, 2378, 2726, 3854, 4418, 4756, 5452, 7708, 8836, 9512, 10904, 15416, 17672, 55883, 64061, 90569, 111766, 128122, 181138, 223532, 256244, 362276, 447064, 512488, 724552, 2626501, 5253002, 10506004, 21012008]

約数ペア:

[(1, 21012008), (2, 10506004), (4, 5253002), (8, 2626501), (29, 724552), (41, 512488), (47, 447064), (58, 362276), (82, 256244), (94, 223532), (116, 181138), (164, 128122), (188, 111766), (232, 90569), (328, 64061), (376, 55883), (1189, 17672), (1363, 15416), (1927, 10904), (2209, 9512), (2378, 8836), (2726, 7708), (3854, 5452), (4418, 4756)]