721000821

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{31}}^2\times {\mathrm{47}}^1\times {\mathrm{313}}^1$

素因数の和:442

約数の個数: 48

約数和(自身を含む): 1077587712

約数和(自身を除く): 356586891

約数列:

[1, 3, 17, 31, 47, 51, 93, 141, 313, 527, 799, 939, 961, 1457, 1581, 2397, 2883, 4371, 5321, 9703, 14711, 15963, 16337, 24769, 29109, 44133, 45167, 49011, 74307, 135501, 164951, 250087, 300793, 456041, 494853, 750261, 767839, 902379, 1368123, 2303517, 5113481, 7752697, 14137271, 15340443, 23258091, 42411813, 240333607, 721000821]

約数ペア:

[(1, 721000821), (3, 240333607), (17, 42411813), (31, 23258091), (47, 15340443), (51, 14137271), (93, 7752697), (141, 5113481), (313, 2303517), (527, 1368123), (799, 902379), (939, 767839), (961, 750261), (1457, 494853), (1581, 456041), (2397, 300793), (2883, 250087), (4371, 164951), (5321, 135501), (9703, 74307), (14711, 49011), (15963, 45167), (16337, 44133), (24769, 29109)]