645761680

素因数分解:

$2^4\times 5^1\times {\mathrm{101}}^1\times {\mathrm{229}}^1\times {\mathrm{349}}^1$

素因数の和:692

約数の個数: 80

約数和(自身を含む): 1527246000

約数和(自身を除く): 881484320

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 101, 202, 229, 349, 404, 458, 505, 698, 808, 916, 1010, 1145, 1396, 1616, 1745, 1832, 2020, 2290, 2792, 3490, 3664, 4040, 4580, 5584, 6980, 8080, 9160, 13960, 18320, 23129, 27920, 35249, 46258, 70498, 79921, 92516, 115645, 140996, 159842, 176245, 185032, 231290, 281992, 319684, 352490, 370064, 399605, 462580, 563984, 639368, 704980, 799210, 925160, 1278736, 1409960, 1598420, 1850320, 2819920, 3196840, 6393680, 8072021, 16144042, 32288084, 40360105, 64576168, 80720210, 129152336, 161440420, 322880840, 645761680]

約数ペア:

[(1, 645761680), (2, 322880840), (4, 161440420), (5, 129152336), (8, 80720210), (10, 64576168), (16, 40360105), (20, 32288084), (40, 16144042), (80, 8072021), (101, 6393680), (202, 3196840), (229, 2819920), (349, 1850320), (404, 1598420), (458, 1409960), (505, 1278736), (698, 925160), (808, 799210), (916, 704980), (1010, 639368), (1145, 563984), (1396, 462580), (1616, 399605), (1745, 370064), (1832, 352490), (2020, 319684), (2290, 281992), (2792, 231290), (3490, 185032), (3664, 176245), (4040, 159842), (4580, 140996), (5584, 115645), (6980, 92516), (8080, 79921), (9160, 70498), (13960, 46258), (18320, 35249), (23129, 27920)]