20969450

素因数分解:

$2^1\times 5^2\times {\mathrm{41}}^1\times {\mathrm{53}}^1\times {\mathrm{193}}^1$

素因数の和:299

約数の個数: 48

約数和(自身を含む): 40919256

約数和(自身を除く): 19949806

約数列:

[1, 2, 5, 10, 25, 41, 50, 53, 82, 106, 193, 205, 265, 386, 410, 530, 965, 1025, 1325, 1930, 2050, 2173, 2650, 4346, 4825, 7913, 9650, 10229, 10865, 15826, 20458, 21730, 39565, 51145, 54325, 79130, 102290, 108650, 197825, 255725, 395650, 419389, 511450, 838778, 2096945, 4193890, 10484725, 20969450]

約数ペア:

[(1, 20969450), (2, 10484725), (5, 4193890), (10, 2096945), (25, 838778), (41, 511450), (50, 419389), (53, 395650), (82, 255725), (106, 197825), (193, 108650), (205, 102290), (265, 79130), (386, 54325), (410, 51145), (530, 39565), (965, 21730), (1025, 20458), (1325, 15826), (1930, 10865), (2050, 10229), (2173, 9650), (2650, 7913), (4346, 4825)]