21531440

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{38449}}^1$

素因数の和:38469

約数の個数: 40

約数和(自身を含む): 57213600

約数和(自身を除く): 35682160

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 560, 38449, 76898, 153796, 192245, 269143, 307592, 384490, 538286, 615184, 768980, 1076572, 1345715, 1537960, 2153144, 2691430, 3075920, 4306288, 5382860, 10765720, 21531440]

約数ペア:

[(1, 21531440), (2, 10765720), (4, 5382860), (5, 4306288), (7, 3075920), (8, 2691430), (10, 2153144), (14, 1537960), (16, 1345715), (20, 1076572), (28, 768980), (35, 615184), (40, 538286), (56, 384490), (70, 307592), (80, 269143), (112, 192245), (140, 153796), (280, 76898), (560, 38449)]