21248110

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{2239}}^1$

素因数の和:2332

約数の個数: 32

約数和(自身を含む): 41771520

約数和(自身を除く): 20523410

約数列:

[1, 2, 5, 10, 13, 26, 65, 73, 130, 146, 365, 730, 949, 1898, 2239, 4478, 4745, 9490, 11195, 22390, 29107, 58214, 145535, 163447, 291070, 326894, 817235, 1634470, 2124811, 4249622, 10624055, 21248110]

約数ペア:

[(1, 21248110), (2, 10624055), (5, 4249622), (10, 2124811), (13, 1634470), (26, 817235), (65, 326894), (73, 291070), (130, 163447), (146, 145535), (365, 58214), (730, 29107), (949, 22390), (1898, 11195), (2239, 9490), (4478, 4745)]