18887990

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{191}}^1$

素因数の和:269

約数の個数: 64

約数和(自身を含む): 39813120

約数和(自身を除く): 20925130

約数列:

[1, 2, 5, 10, 11, 22, 29, 31, 55, 58, 62, 110, 145, 155, 191, 290, 310, 319, 341, 382, 638, 682, 899, 955, 1595, 1705, 1798, 1910, 2101, 3190, 3410, 4202, 4495, 5539, 5921, 8990, 9889, 10505, 11078, 11842, 19778, 21010, 27695, 29605, 49445, 55390, 59210, 60929, 65131, 98890, 121858, 130262, 171709, 304645, 325655, 343418, 609290, 651310, 858545, 1717090, 1888799, 3777598, 9443995, 18887990]

約数ペア:

[(1, 18887990), (2, 9443995), (5, 3777598), (10, 1888799), (11, 1717090), (22, 858545), (29, 651310), (31, 609290), (55, 343418), (58, 325655), (62, 304645), (110, 171709), (145, 130262), (155, 121858), (191, 98890), (290, 65131), (310, 60929), (319, 59210), (341, 55390), (382, 49445), (638, 29605), (682, 27695), (899, 21010), (955, 19778), (1595, 11842), (1705, 11078), (1798, 10505), (1910, 9889), (2101, 8990), (3190, 5921), (3410, 5539), (4202, 4495)]