20416916

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{397}}^1$

素因数の和:480

約数の個数: 48

約数和(自身を含む): 41188224

約数和(自身を除く): 20771308

約数列:

[1, 2, 4, 13, 23, 26, 43, 46, 52, 86, 92, 172, 299, 397, 559, 598, 794, 989, 1118, 1196, 1588, 1978, 2236, 3956, 5161, 9131, 10322, 12857, 17071, 18262, 20644, 25714, 34142, 36524, 51428, 68284, 118703, 221923, 237406, 392633, 443846, 474812, 785266, 887692, 1570532, 5104229, 10208458, 20416916]

約数ペア:

[(1, 20416916), (2, 10208458), (4, 5104229), (13, 1570532), (23, 887692), (26, 785266), (43, 474812), (46, 443846), (52, 392633), (86, 237406), (92, 221923), (172, 118703), (299, 68284), (397, 51428), (559, 36524), (598, 34142), (794, 25714), (989, 20644), (1118, 18262), (1196, 17071), (1588, 12857), (1978, 10322), (2236, 9131), (3956, 5161)]