19689904

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{181}}^1\times {\mathrm{523}}^1$

素因数の和:725

約数の個数: 40

約数和(自身を含む): 41389712

約数和(自身を除く): 21699808

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 181, 208, 362, 523, 724, 1046, 1448, 2092, 2353, 2896, 4184, 4706, 6799, 8368, 9412, 13598, 18824, 27196, 37648, 54392, 94663, 108784, 189326, 378652, 757304, 1230619, 1514608, 2461238, 4922476, 9844952, 19689904]

約数ペア:

[(1, 19689904), (2, 9844952), (4, 4922476), (8, 2461238), (13, 1514608), (16, 1230619), (26, 757304), (52, 378652), (104, 189326), (181, 108784), (208, 94663), (362, 54392), (523, 37648), (724, 27196), (1046, 18824), (1448, 13598), (2092, 9412), (2353, 8368), (2896, 6799), (4184, 4706)]