19998257840

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{727}}^1\times {\mathrm{31259}}^1$

素因数の和:32010

約数の個数: 80

約数和(自身を含む): 50794248960

約数和(自身を除く): 30795991120

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 440, 727, 880, 1454, 2908, 3635, 5816, 7270, 7997, 11632, 14540, 15994, 29080, 31259, 31988, 39985, 58160, 62518, 63976, 79970, 125036, 127952, 156295, 159940, 250072, 312590, 319880, 343849, 500144, 625180, 639760, 687698, 1250360, 1375396, 1719245, 2500720, 2750792, 3438490, 5501584, 6876980, 13753960, 22725293, 27507920, 45450586, 90901172, 113626465, 181802344, 227252930, 249978223, 363604688, 454505860, 499956446, 909011720, 999912892, 1249891115, 1818023440, 1999825784, 2499782230, 3999651568, 4999564460, 9999128920, 19998257840]

約数ペア:

[(1, 19998257840), (2, 9999128920), (4, 4999564460), (5, 3999651568), (8, 2499782230), (10, 1999825784), (11, 1818023440), (16, 1249891115), (20, 999912892), (22, 909011720), (40, 499956446), (44, 454505860), (55, 363604688), (80, 249978223), (88, 227252930), (110, 181802344), (176, 113626465), (220, 90901172), (440, 45450586), (727, 27507920), (880, 22725293), (1454, 13753960), (2908, 6876980), (3635, 5501584), (5816, 3438490), (7270, 2750792), (7997, 2500720), (11632, 1719245), (14540, 1375396), (15994, 1250360), (29080, 687698), (31259, 639760), (31988, 625180), (39985, 500144), (58160, 343849), (62518, 319880), (63976, 312590), (79970, 250072), (125036, 159940), (127952, 156295)]