81520660

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{241}}^1\times {\mathrm{1301}}^1$

素因数の和:1564

約数の個数: 48

約数和(自身を含む): 185269392

約数和(自身を除く): 103748732

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 241, 260, 482, 964, 1205, 1301, 2410, 2602, 3133, 4820, 5204, 6266, 6505, 12532, 13010, 15665, 16913, 26020, 31330, 33826, 62660, 67652, 84565, 169130, 313541, 338260, 627082, 1254164, 1567705, 3135410, 4076033, 6270820, 8152066, 16304132, 20380165, 40760330, 81520660]

約数ペア:

[(1, 81520660), (2, 40760330), (4, 20380165), (5, 16304132), (10, 8152066), (13, 6270820), (20, 4076033), (26, 3135410), (52, 1567705), (65, 1254164), (130, 627082), (241, 338260), (260, 313541), (482, 169130), (964, 84565), (1205, 67652), (1301, 62660), (2410, 33826), (2602, 31330), (3133, 26020), (4820, 16913), (5204, 15665), (6266, 13010), (6505, 12532)]