20136784

素因数分解:

$2^4\times {\mathrm{79}}^1\times {\mathrm{89}}^1\times {\mathrm{179}}^1$

素因数の和:355

約数の個数: 40

約数和(自身を含む): 40176000

約数和(自身を除く): 20039216

約数列:

[1, 2, 4, 8, 16, 79, 89, 158, 178, 179, 316, 356, 358, 632, 712, 716, 1264, 1424, 1432, 2864, 7031, 14062, 14141, 15931, 28124, 28282, 31862, 56248, 56564, 63724, 112496, 113128, 127448, 226256, 254896, 1258549, 2517098, 5034196, 10068392, 20136784]

約数ペア:

[(1, 20136784), (2, 10068392), (4, 5034196), (8, 2517098), (16, 1258549), (79, 254896), (89, 226256), (158, 127448), (178, 113128), (179, 112496), (316, 63724), (356, 56564), (358, 56248), (632, 31862), (712, 28282), (716, 28124), (1264, 15931), (1424, 14141), (1432, 14062), (2864, 7031)]