20865195

素因数分解:

$3^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{1321}}^1$

素因数の和:1354

約数の個数: 48

約数和(自身を含む): 40421472

約数和(自身を除く): 19556277

約数列:

[1, 3, 5, 9, 13, 15, 27, 39, 45, 65, 81, 117, 135, 195, 243, 351, 405, 585, 1053, 1215, 1321, 1755, 3159, 3963, 5265, 6605, 11889, 15795, 17173, 19815, 35667, 51519, 59445, 85865, 107001, 154557, 178335, 257595, 321003, 463671, 535005, 772785, 1391013, 1605015, 2318355, 4173039, 6955065, 20865195]

約数ペア:

[(1, 20865195), (3, 6955065), (5, 4173039), (9, 2318355), (13, 1605015), (15, 1391013), (27, 772785), (39, 535005), (45, 463671), (65, 321003), (81, 257595), (117, 178335), (135, 154557), (195, 107001), (243, 85865), (351, 59445), (405, 51519), (585, 35667), (1053, 19815), (1215, 17173), (1321, 15795), (1755, 11889), (3159, 6605), (3963, 5265)]