20285720

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{5573}}^1$

素因数の和:5604

約数の個数: 64

約数和(自身を含む): 56185920

約数和(自身を除く): 35900200

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 20, 26, 28, 35, 40, 52, 56, 65, 70, 91, 104, 130, 140, 182, 260, 280, 364, 455, 520, 728, 910, 1820, 3640, 5573, 11146, 22292, 27865, 39011, 44584, 55730, 72449, 78022, 111460, 144898, 156044, 195055, 222920, 289796, 312088, 362245, 390110, 507143, 579592, 724490, 780220, 1014286, 1448980, 1560440, 2028572, 2535715, 2897960, 4057144, 5071430, 10142860, 20285720]

約数ペア:

[(1, 20285720), (2, 10142860), (4, 5071430), (5, 4057144), (7, 2897960), (8, 2535715), (10, 2028572), (13, 1560440), (14, 1448980), (20, 1014286), (26, 780220), (28, 724490), (35, 579592), (40, 507143), (52, 390110), (56, 362245), (65, 312088), (70, 289796), (91, 222920), (104, 195055), (130, 156044), (140, 144898), (182, 111460), (260, 78022), (280, 72449), (364, 55730), (455, 44584), (520, 39011), (728, 27865), (910, 22292), (1820, 11146), (3640, 5573)]