20991204

素因数分解:

$2^2\times 3^3\times {\mathrm{13}}^1\times {\mathrm{14951}}^1$

素因数の和:14977

約数の個数: 48

約数和(自身を含む): 58611840

約数和(自身を除く): 37620636

約数列:

[1, 2, 3, 4, 6, 9, 12, 13, 18, 26, 27, 36, 39, 52, 54, 78, 108, 117, 156, 234, 351, 468, 702, 1404, 14951, 29902, 44853, 59804, 89706, 134559, 179412, 194363, 269118, 388726, 403677, 538236, 583089, 777452, 807354, 1166178, 1614708, 1749267, 2332356, 3498534, 5247801, 6997068, 10495602, 20991204]

約数ペア:

[(1, 20991204), (2, 10495602), (3, 6997068), (4, 5247801), (6, 3498534), (9, 2332356), (12, 1749267), (13, 1614708), (18, 1166178), (26, 807354), (27, 777452), (36, 583089), (39, 538236), (52, 403677), (54, 388726), (78, 269118), (108, 194363), (117, 179412), (156, 134559), (234, 89706), (351, 59804), (468, 44853), (702, 29902), (1404, 14951)]