20511868

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{1597}}^1$

素因数の和:1646

約数の個数: 36

約数和(自身を含む): 40940760

約数和(自身を除く): 20428892

約数列:

[1, 2, 4, 13, 19, 26, 38, 52, 76, 169, 247, 338, 494, 676, 988, 1597, 3194, 3211, 6388, 6422, 12844, 20761, 30343, 41522, 60686, 83044, 121372, 269893, 394459, 539786, 788918, 1079572, 1577836, 5127967, 10255934, 20511868]

約数ペア:

[(1, 20511868), (2, 10255934), (4, 5127967), (13, 1577836), (19, 1079572), (26, 788918), (38, 539786), (52, 394459), (76, 269893), (169, 121372), (247, 83044), (338, 60686), (494, 41522), (676, 30343), (988, 20761), (1597, 12844), (3194, 6422), (3211, 6388)]