28791399

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{263}}^1\times {\mathrm{401}}^1$

素因数の和:687

約数の個数: 32

約数和(自身を含む): 47545344

約数和(自身を除く): 18753945

約数列:

[1, 3, 7, 13, 21, 39, 91, 263, 273, 401, 789, 1203, 1841, 2807, 3419, 5213, 5523, 8421, 10257, 15639, 23933, 36491, 71799, 105463, 109473, 316389, 738241, 1371019, 2214723, 4113057, 9597133, 28791399]

約数ペア:

[(1, 28791399), (3, 9597133), (7, 4113057), (13, 2214723), (21, 1371019), (39, 738241), (91, 316389), (263, 109473), (273, 105463), (401, 71799), (789, 36491), (1203, 23933), (1841, 15639), (2807, 10257), (3419, 8421), (5213, 5523)]