21385840

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{38189}}^1$

素因数の和:38209

約数の個数: 40

約数和(自身を含む): 56826720

約数和(自身を除く): 35440880

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 560, 38189, 76378, 152756, 190945, 267323, 305512, 381890, 534646, 611024, 763780, 1069292, 1336615, 1527560, 2138584, 2673230, 3055120, 4277168, 5346460, 10692920, 21385840]

約数ペア:

[(1, 21385840), (2, 10692920), (4, 5346460), (5, 4277168), (7, 3055120), (8, 2673230), (10, 2138584), (14, 1527560), (16, 1336615), (20, 1069292), (28, 763780), (35, 611024), (40, 534646), (56, 381890), (70, 305512), (80, 267323), (112, 190945), (140, 152756), (280, 76378), (560, 38189)]