20895440

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{233}}^1$

素因数の和:324

約数の個数: 80

約数和(自身を含む): 52228800

約数和(自身を除く): 31333360

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 59, 76, 80, 95, 118, 152, 190, 233, 236, 295, 304, 380, 466, 472, 590, 760, 932, 944, 1121, 1165, 1180, 1520, 1864, 2242, 2330, 2360, 3728, 4427, 4484, 4660, 4720, 5605, 8854, 8968, 9320, 11210, 13747, 17708, 17936, 18640, 22135, 22420, 27494, 35416, 44270, 44840, 54988, 68735, 70832, 88540, 89680, 109976, 137470, 177080, 219952, 261193, 274940, 354160, 522386, 549880, 1044772, 1099760, 1305965, 2089544, 2611930, 4179088, 5223860, 10447720, 20895440]

約数ペア:

[(1, 20895440), (2, 10447720), (4, 5223860), (5, 4179088), (8, 2611930), (10, 2089544), (16, 1305965), (19, 1099760), (20, 1044772), (38, 549880), (40, 522386), (59, 354160), (76, 274940), (80, 261193), (95, 219952), (118, 177080), (152, 137470), (190, 109976), (233, 89680), (236, 88540), (295, 70832), (304, 68735), (380, 54988), (466, 44840), (472, 44270), (590, 35416), (760, 27494), (932, 22420), (944, 22135), (1121, 18640), (1165, 17936), (1180, 17708), (1520, 13747), (1864, 11210), (2242, 9320), (2330, 8968), (2360, 8854), (3728, 5605), (4427, 4720), (4484, 4660)]