19978832

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{409}}^1$

素因数の和:531

約数の個数: 40

約数和(自身を含む): 40265280

約数和(自身を除く): 20286448

約数列:

[1, 2, 4, 8, 16, 43, 71, 86, 142, 172, 284, 344, 409, 568, 688, 818, 1136, 1636, 3053, 3272, 6106, 6544, 12212, 17587, 24424, 29039, 35174, 48848, 58078, 70348, 116156, 140696, 232312, 281392, 464624, 1248677, 2497354, 4994708, 9989416, 19978832]

約数ペア:

[(1, 19978832), (2, 9989416), (4, 4994708), (8, 2497354), (16, 1248677), (43, 464624), (71, 281392), (86, 232312), (142, 140696), (172, 116156), (284, 70348), (344, 58078), (409, 48848), (568, 35174), (688, 29039), (818, 24424), (1136, 17587), (1636, 12212), (3053, 6544), (3272, 6106)]