399157941

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{20029}}^1$

素因数の和:20125

約数の個数: 32

約数和(自身を含む): 664034560

約数和(自身を除く): 264876619

約数列:

[1, 3, 7, 13, 21, 39, 73, 91, 219, 273, 511, 949, 1533, 2847, 6643, 19929, 20029, 60087, 140203, 260377, 420609, 781131, 1462117, 1822639, 4386351, 5467917, 10234819, 19007521, 30704457, 57022563, 133052647, 399157941]

約数ペア:

[(1, 399157941), (3, 133052647), (7, 57022563), (13, 30704457), (21, 19007521), (39, 10234819), (73, 5467917), (91, 4386351), (219, 1822639), (273, 1462117), (511, 781131), (949, 420609), (1533, 260377), (2847, 140203), (6643, 60087), (19929, 20029)]