21437260

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{2011}}^1$

素因数の和:2074

約数の個数: 48

約数和(自身を含む): 49688352

約数和(自身を除く): 28251092

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 41, 52, 65, 82, 130, 164, 205, 260, 410, 533, 820, 1066, 2011, 2132, 2665, 4022, 5330, 8044, 10055, 10660, 20110, 26143, 40220, 52286, 82451, 104572, 130715, 164902, 261430, 329804, 412255, 522860, 824510, 1071863, 1649020, 2143726, 4287452, 5359315, 10718630, 21437260]

約数ペア:

[(1, 21437260), (2, 10718630), (4, 5359315), (5, 4287452), (10, 2143726), (13, 1649020), (20, 1071863), (26, 824510), (41, 522860), (52, 412255), (65, 329804), (82, 261430), (130, 164902), (164, 130715), (205, 104572), (260, 82451), (410, 52286), (533, 40220), (820, 26143), (1066, 20110), (2011, 10660), (2132, 10055), (2665, 8044), (4022, 5330)]