21479408

素因数分解:

$2^4\times {\mathrm{41}}^1\times {\mathrm{137}}^1\times {\mathrm{239}}^1$

素因数の和:425

約数の個数: 40

約数和(自身を含む): 43122240

約数和(自身を除く): 21642832

約数列:

[1, 2, 4, 8, 16, 41, 82, 137, 164, 239, 274, 328, 478, 548, 656, 956, 1096, 1912, 2192, 3824, 5617, 9799, 11234, 19598, 22468, 32743, 39196, 44936, 65486, 78392, 89872, 130972, 156784, 261944, 523888, 1342463, 2684926, 5369852, 10739704, 21479408]

約数ペア:

[(1, 21479408), (2, 10739704), (4, 5369852), (8, 2684926), (16, 1342463), (41, 523888), (82, 261944), (137, 156784), (164, 130972), (239, 89872), (274, 78392), (328, 65486), (478, 44936), (548, 39196), (656, 32743), (956, 22468), (1096, 19598), (1912, 11234), (2192, 9799), (3824, 5617)]