28125513

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{73}}^1\times {\mathrm{89}}^1$

素因数の和:218

約数の個数: 48

約数和(自身を含む): 46060560

約数和(自身を除く): 17935047

約数列:

[1, 3, 9, 13, 37, 39, 73, 89, 111, 117, 219, 267, 333, 481, 657, 801, 949, 1157, 1443, 2701, 2847, 3293, 3471, 4329, 6497, 8103, 8541, 9879, 10413, 19491, 24309, 29637, 35113, 42809, 58473, 84461, 105339, 128427, 240389, 253383, 316017, 385281, 721167, 760149, 2163501, 3125057, 9375171, 28125513]

約数ペア:

[(1, 28125513), (3, 9375171), (9, 3125057), (13, 2163501), (37, 760149), (39, 721167), (73, 385281), (89, 316017), (111, 253383), (117, 240389), (219, 128427), (267, 105339), (333, 84461), (481, 58473), (657, 42809), (801, 35113), (949, 29637), (1157, 24309), (1443, 19491), (2701, 10413), (2847, 9879), (3293, 8541), (3471, 8103), (4329, 6497)]