21039928

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{28901}}^1$

素因数の和:28927

約数の個数: 32

約数和(自身を含む): 48555360

約数和(自身を除く): 27515432

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 52, 56, 91, 104, 182, 364, 728, 28901, 57802, 115604, 202307, 231208, 375713, 404614, 751426, 809228, 1502852, 1618456, 2629991, 3005704, 5259982, 10519964, 21039928]

約数ペア:

[(1, 21039928), (2, 10519964), (4, 5259982), (7, 3005704), (8, 2629991), (13, 1618456), (14, 1502852), (26, 809228), (28, 751426), (52, 404614), (56, 375713), (91, 231208), (104, 202307), (182, 115604), (364, 57802), (728, 28901)]