21157539

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{103}}^1\times {\mathrm{229}}^1$

素因数の和:371

約数の個数: 32

約数和(自身を含む): 32148480

約数和(自身を除く): 10990941

約数列:

[1, 3, 13, 23, 39, 69, 103, 229, 299, 309, 687, 897, 1339, 2369, 2977, 4017, 5267, 7107, 8931, 15801, 23587, 30797, 68471, 70761, 92391, 205413, 306631, 542501, 919893, 1627503, 7052513, 21157539]

約数ペア:

[(1, 21157539), (3, 7052513), (13, 1627503), (23, 919893), (39, 542501), (69, 306631), (103, 205413), (229, 92391), (299, 70761), (309, 68471), (687, 30797), (897, 23587), (1339, 15801), (2369, 8931), (2977, 7107), (4017, 5267)]