20400100

素因数分解:

$2^2\times 5^2\times 7^1\times {\mathrm{151}}^1\times {\mathrm{193}}^1$

素因数の和:365

約数の個数: 72

約数和(自身を含む): 51191168

約数和(自身を除く): 30791068

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 25, 28, 35, 50, 70, 100, 140, 151, 175, 193, 302, 350, 386, 604, 700, 755, 772, 965, 1057, 1351, 1510, 1930, 2114, 2702, 3020, 3775, 3860, 4228, 4825, 5285, 5404, 6755, 7550, 9650, 10570, 13510, 15100, 19300, 21140, 26425, 27020, 29143, 33775, 52850, 58286, 67550, 105700, 116572, 135100, 145715, 204001, 291430, 408002, 582860, 728575, 816004, 1020005, 1457150, 2040010, 2914300, 4080020, 5100025, 10200050, 20400100]

約数ペア:

[(1, 20400100), (2, 10200050), (4, 5100025), (5, 4080020), (7, 2914300), (10, 2040010), (14, 1457150), (20, 1020005), (25, 816004), (28, 728575), (35, 582860), (50, 408002), (70, 291430), (100, 204001), (140, 145715), (151, 135100), (175, 116572), (193, 105700), (302, 67550), (350, 58286), (386, 52850), (604, 33775), (700, 29143), (755, 27020), (772, 26425), (965, 21140), (1057, 19300), (1351, 15100), (1510, 13510), (1930, 10570), (2114, 9650), (2702, 7550), (3020, 6755), (3775, 5404), (3860, 5285), (4228, 4825)]