20966140

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{6203}}^1$

素因数の和:6238

約数の個数: 36

約数和(自身を含む): 47683944

約数和(自身を除く): 26717804

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 169, 260, 338, 676, 845, 1690, 3380, 6203, 12406, 24812, 31015, 62030, 80639, 124060, 161278, 322556, 403195, 806390, 1048307, 1612780, 2096614, 4193228, 5241535, 10483070, 20966140]

約数ペア:

[(1, 20966140), (2, 10483070), (4, 5241535), (5, 4193228), (10, 2096614), (13, 1612780), (20, 1048307), (26, 806390), (52, 403195), (65, 322556), (130, 161278), (169, 124060), (260, 80639), (338, 62030), (676, 31015), (845, 24812), (1690, 12406), (3380, 6203)]