21261712

素因数分解:

$2^4\times {\mathrm{59}}^1\times {\mathrm{101}}^1\times {\mathrm{223}}^1$

素因数の和:391

約数の個数: 40

約数和(自身を含む): 42497280

約数和(自身を除く): 21235568

約数列:

[1, 2, 4, 8, 16, 59, 101, 118, 202, 223, 236, 404, 446, 472, 808, 892, 944, 1616, 1784, 3568, 5959, 11918, 13157, 22523, 23836, 26314, 45046, 47672, 52628, 90092, 95344, 105256, 180184, 210512, 360368, 1328857, 2657714, 5315428, 10630856, 21261712]

約数ペア:

[(1, 21261712), (2, 10630856), (4, 5315428), (8, 2657714), (16, 1328857), (59, 360368), (101, 210512), (118, 180184), (202, 105256), (223, 95344), (236, 90092), (404, 52628), (446, 47672), (472, 45046), (808, 26314), (892, 23836), (944, 22523), (1616, 13157), (1784, 11918), (3568, 5959)]