19999252

素因数分解:

$2^2\times 7^2\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{167}}^1$

素因数の和:245

約数の個数: 72

約数和(自身を含む): 45045504

約数和(自身を除く): 25046252

約数列:

[1, 2, 4, 7, 13, 14, 26, 28, 47, 49, 52, 91, 94, 98, 167, 182, 188, 196, 329, 334, 364, 611, 637, 658, 668, 1169, 1222, 1274, 1316, 2171, 2303, 2338, 2444, 2548, 4277, 4342, 4606, 4676, 7849, 8183, 8554, 8684, 9212, 15197, 15698, 16366, 17108, 29939, 30394, 31396, 32732, 54943, 59878, 60788, 102037, 106379, 109886, 119756, 204074, 212758, 219772, 384601, 408148, 425516, 714259, 769202, 1428518, 1538404, 2857036, 4999813, 9999626, 19999252]

約数ペア:

[(1, 19999252), (2, 9999626), (4, 4999813), (7, 2857036), (13, 1538404), (14, 1428518), (26, 769202), (28, 714259), (47, 425516), (49, 408148), (52, 384601), (91, 219772), (94, 212758), (98, 204074), (167, 119756), (182, 109886), (188, 106379), (196, 102037), (329, 60788), (334, 59878), (364, 54943), (611, 32732), (637, 31396), (658, 30394), (668, 29939), (1169, 17108), (1222, 16366), (1274, 15698), (1316, 15197), (2171, 9212), (2303, 8684), (2338, 8554), (2444, 8183), (2548, 7849), (4277, 4676), (4342, 4606)]