19257980

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{43}}^1\times {\mathrm{457}}^1$

素因数の和:523

約数の個数: 72

約数和(自身を含む): 48243888

約数和(自身を除く): 28985908

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 43, 49, 70, 86, 98, 140, 172, 196, 215, 245, 301, 430, 457, 490, 602, 860, 914, 980, 1204, 1505, 1828, 2107, 2285, 3010, 3199, 4214, 4570, 6020, 6398, 8428, 9140, 10535, 12796, 15995, 19651, 21070, 22393, 31990, 39302, 42140, 44786, 63980, 78604, 89572, 98255, 111965, 137557, 196510, 223930, 275114, 393020, 447860, 550228, 687785, 962899, 1375570, 1925798, 2751140, 3851596, 4814495, 9628990, 19257980]

約数ペア:

[(1, 19257980), (2, 9628990), (4, 4814495), (5, 3851596), (7, 2751140), (10, 1925798), (14, 1375570), (20, 962899), (28, 687785), (35, 550228), (43, 447860), (49, 393020), (70, 275114), (86, 223930), (98, 196510), (140, 137557), (172, 111965), (196, 98255), (215, 89572), (245, 78604), (301, 63980), (430, 44786), (457, 42140), (490, 39302), (602, 31990), (860, 22393), (914, 21070), (980, 19651), (1204, 15995), (1505, 12796), (1828, 10535), (2107, 9140), (2285, 8428), (3010, 6398), (3199, 6020), (4214, 4570)]