19781744

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{72727}}^1$

素因数の和:72752

約数の個数: 20

約数和(自身を含む): 40582224

約数和(自身を除く): 20800480

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 272, 72727, 145454, 290908, 581816, 1163632, 1236359, 2472718, 4945436, 9890872, 19781744]

約数ペア:

[(1, 19781744), (2, 9890872), (4, 4945436), (8, 2472718), (16, 1236359), (17, 1163632), (34, 581816), (68, 290908), (136, 145454), (272, 72727)]