19513900

素因数分解:

$2^2\times 5^2\times 7^1\times {\mathrm{61}}^1\times {\mathrm{457}}^1$

素因数の和:539

約数の個数: 72

約数和(自身を含む): 49295456

約数和(自身を除く): 29781556

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 25, 28, 35, 50, 61, 70, 100, 122, 140, 175, 244, 305, 350, 427, 457, 610, 700, 854, 914, 1220, 1525, 1708, 1828, 2135, 2285, 3050, 3199, 4270, 4570, 6100, 6398, 8540, 9140, 10675, 11425, 12796, 15995, 21350, 22850, 27877, 31990, 42700, 45700, 55754, 63980, 79975, 111508, 139385, 159950, 195139, 278770, 319900, 390278, 557540, 696925, 780556, 975695, 1393850, 1951390, 2787700, 3902780, 4878475, 9756950, 19513900]

約数ペア:

[(1, 19513900), (2, 9756950), (4, 4878475), (5, 3902780), (7, 2787700), (10, 1951390), (14, 1393850), (20, 975695), (25, 780556), (28, 696925), (35, 557540), (50, 390278), (61, 319900), (70, 278770), (100, 195139), (122, 159950), (140, 139385), (175, 111508), (244, 79975), (305, 63980), (350, 55754), (427, 45700), (457, 42700), (610, 31990), (700, 27877), (854, 22850), (914, 21350), (1220, 15995), (1525, 12796), (1708, 11425), (1828, 10675), (2135, 9140), (2285, 8540), (3050, 6398), (3199, 6100), (4270, 4570)]