18881919

素因数分解:

$3^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{83}}^1\times {\mathrm{157}}^1$

素因数の和:276

約数の個数: 48

約数和(自身を含む): 33126912

約数和(自身を除く): 14244993

約数列:

[1, 3, 7, 9, 21, 23, 63, 69, 83, 157, 161, 207, 249, 471, 483, 581, 747, 1099, 1413, 1449, 1743, 1909, 3297, 3611, 5229, 5727, 9891, 10833, 13031, 13363, 17181, 25277, 32499, 39093, 40089, 75831, 91217, 117279, 120267, 227493, 273651, 299713, 820953, 899139, 2097991, 2697417, 6293973, 18881919]

約数ペア:

[(1, 18881919), (3, 6293973), (7, 2697417), (9, 2097991), (21, 899139), (23, 820953), (63, 299713), (69, 273651), (83, 227493), (157, 120267), (161, 117279), (207, 91217), (249, 75831), (471, 40089), (483, 39093), (581, 32499), (747, 25277), (1099, 17181), (1413, 13363), (1449, 13031), (1743, 10833), (1909, 9891), (3297, 5727), (3611, 5229)]