257171880

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{306157}}^1$

素因数の和:306178

約数の個数: 64

約数和(自身を含む): 881735040

約数和(自身を除く): 624563160

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840, 306157, 612314, 918471, 1224628, 1530785, 1836942, 2143099, 2449256, 3061570, 3673884, 4286198, 4592355, 6123140, 6429297, 7347768, 8572396, 9184710, 10715495, 12246280, 12858594, 17144792, 18369420, 21430990, 25717188, 32146485, 36738840, 42861980, 51434376, 64292970, 85723960, 128585940, 257171880]

約数ペア:

[(1, 257171880), (2, 128585940), (3, 85723960), (4, 64292970), (5, 51434376), (6, 42861980), (7, 36738840), (8, 32146485), (10, 25717188), (12, 21430990), (14, 18369420), (15, 17144792), (20, 12858594), (21, 12246280), (24, 10715495), (28, 9184710), (30, 8572396), (35, 7347768), (40, 6429297), (42, 6123140), (56, 4592355), (60, 4286198), (70, 3673884), (84, 3061570), (105, 2449256), (120, 2143099), (140, 1836942), (168, 1530785), (210, 1224628), (280, 918471), (420, 612314), (840, 306157)]