18764980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{72173}}^1$

素因数の和:72195

約数の個数: 24

約数和(自身を含む): 42438312

約数和(自身を除く): 23673332

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 72173, 144346, 288692, 360865, 721730, 938249, 1443460, 1876498, 3752996, 4691245, 9382490, 18764980]

約数ペア:

[(1, 18764980), (2, 9382490), (4, 4691245), (5, 3752996), (10, 1876498), (13, 1443460), (20, 938249), (26, 721730), (52, 360865), (65, 288692), (130, 144346), (260, 72173)]