21578776

素因数分解:

$2^3\times {\mathrm{43}}^1\times {\mathrm{149}}^1\times {\mathrm{421}}^1$

素因数の和:619

約数の個数: 32

約数和(自身を含む): 41778000

約数和(自身を除く): 20199224

約数列:

[1, 2, 4, 8, 43, 86, 149, 172, 298, 344, 421, 596, 842, 1192, 1684, 3368, 6407, 12814, 18103, 25628, 36206, 51256, 62729, 72412, 125458, 144824, 250916, 501832, 2697347, 5394694, 10789388, 21578776]

約数ペア:

[(1, 21578776), (2, 10789388), (4, 5394694), (8, 2697347), (43, 501832), (86, 250916), (149, 144824), (172, 125458), (298, 72412), (344, 62729), (421, 51256), (596, 36206), (842, 25628), (1192, 18103), (1684, 12814), (3368, 6407)]