19658320

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{251}}^1$

素因数の和:364

約数の個数: 80

約数和(自身を含む): 50621760

約数和(自身を除く): 30963440

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 89, 110, 176, 178, 220, 251, 356, 440, 445, 502, 712, 880, 890, 979, 1004, 1255, 1424, 1780, 1958, 2008, 2510, 2761, 3560, 3916, 4016, 4895, 5020, 5522, 7120, 7832, 9790, 10040, 11044, 13805, 15664, 19580, 20080, 22088, 22339, 27610, 39160, 44176, 44678, 55220, 78320, 89356, 110440, 111695, 178712, 220880, 223390, 245729, 357424, 446780, 491458, 893560, 982916, 1228645, 1787120, 1965832, 2457290, 3931664, 4914580, 9829160, 19658320]

約数ペア:

[(1, 19658320), (2, 9829160), (4, 4914580), (5, 3931664), (8, 2457290), (10, 1965832), (11, 1787120), (16, 1228645), (20, 982916), (22, 893560), (40, 491458), (44, 446780), (55, 357424), (80, 245729), (88, 223390), (89, 220880), (110, 178712), (176, 111695), (178, 110440), (220, 89356), (251, 78320), (356, 55220), (440, 44678), (445, 44176), (502, 39160), (712, 27610), (880, 22339), (890, 22088), (979, 20080), (1004, 19580), (1255, 15664), (1424, 13805), (1780, 11044), (1958, 10040), (2008, 9790), (2510, 7832), (2761, 7120), (3560, 5522), (3916, 5020), (4016, 4895)]