17980840

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{401}}^1$

素因数の和:490

約数の個数: 64

約数和(自身を含む): 43416000

約数和(自身を除く): 25435160

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 59, 76, 95, 118, 152, 190, 236, 295, 380, 401, 472, 590, 760, 802, 1121, 1180, 1604, 2005, 2242, 2360, 3208, 4010, 4484, 5605, 7619, 8020, 8968, 11210, 15238, 16040, 22420, 23659, 30476, 38095, 44840, 47318, 60952, 76190, 94636, 118295, 152380, 189272, 236590, 304760, 449521, 473180, 899042, 946360, 1798084, 2247605, 3596168, 4495210, 8990420, 17980840]

約数ペア:

[(1, 17980840), (2, 8990420), (4, 4495210), (5, 3596168), (8, 2247605), (10, 1798084), (19, 946360), (20, 899042), (38, 473180), (40, 449521), (59, 304760), (76, 236590), (95, 189272), (118, 152380), (152, 118295), (190, 94636), (236, 76190), (295, 60952), (380, 47318), (401, 44840), (472, 38095), (590, 30476), (760, 23659), (802, 22420), (1121, 16040), (1180, 15238), (1604, 11210), (2005, 8968), (2242, 8020), (2360, 7619), (3208, 5605), (4010, 4484)]