1728740

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{109}}^1$

素因数の和:192

約数の個数: 48

約数和(自身を含む): 4010160

約数和(自身を除く): 2281420

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 61, 65, 109, 122, 130, 218, 244, 260, 305, 436, 545, 610, 793, 1090, 1220, 1417, 1586, 2180, 2834, 3172, 3965, 5668, 6649, 7085, 7930, 13298, 14170, 15860, 26596, 28340, 33245, 66490, 86437, 132980, 172874, 345748, 432185, 864370, 1728740]

約数ペア:

[(1, 1728740), (2, 864370), (4, 432185), (5, 345748), (10, 172874), (13, 132980), (20, 86437), (26, 66490), (52, 33245), (61, 28340), (65, 26596), (109, 15860), (122, 14170), (130, 13298), (218, 7930), (244, 7085), (260, 6649), (305, 5668), (436, 3965), (545, 3172), (610, 2834), (793, 2180), (1090, 1586), (1220, 1417)]