20503515

素因数分解:

$3^1\times 5^1\times {\mathrm{47}}^1\times {\mathrm{127}}^1\times {\mathrm{229}}^1$

素因数の和:411

約数の個数: 32

約数和(自身を含む): 33914880

約数和(自身を除く): 13411365

約数列:

[1, 3, 5, 15, 47, 127, 141, 229, 235, 381, 635, 687, 705, 1145, 1905, 3435, 5969, 10763, 17907, 29083, 29845, 32289, 53815, 87249, 89535, 145415, 161445, 436245, 1366901, 4100703, 6834505, 20503515]

約数ペア:

[(1, 20503515), (3, 6834505), (5, 4100703), (15, 1366901), (47, 436245), (127, 161445), (141, 145415), (229, 89535), (235, 87249), (381, 53815), (635, 32289), (687, 29845), (705, 29083), (1145, 17907), (1905, 10763), (3435, 5969)]