19979258

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{79}}^1\times {\mathrm{137}}^1$

素因数の和:302

約数の個数: 32

約数和(自身を含む): 33384960

約数和(自身を除く): 13405702

約数列:

[1, 2, 13, 26, 71, 79, 137, 142, 158, 274, 923, 1027, 1781, 1846, 2054, 3562, 5609, 9727, 10823, 11218, 19454, 21646, 72917, 126451, 140699, 145834, 252902, 281398, 768433, 1536866, 9989629, 19979258]

約数ペア:

[(1, 19979258), (2, 9989629), (13, 1536866), (26, 768433), (71, 281398), (79, 252902), (137, 145834), (142, 140699), (158, 126451), (274, 72917), (923, 21646), (1027, 19454), (1781, 11218), (1846, 10823), (2054, 9727), (3562, 5609)]