257495980

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{13829}}^1$

素因数の和:13871

約数の個数: 72

約数和(自身を含む): 662180400

約数和(自身を除く): 404684420

約数列:

[1, 2, 4, 5, 7, 10, 14, 19, 20, 28, 35, 38, 49, 70, 76, 95, 98, 133, 140, 190, 196, 245, 266, 380, 490, 532, 665, 931, 980, 1330, 1862, 2660, 3724, 4655, 9310, 13829, 18620, 27658, 55316, 69145, 96803, 138290, 193606, 262751, 276580, 387212, 484015, 525502, 677621, 968030, 1051004, 1313755, 1355242, 1839257, 1936060, 2627510, 2710484, 3388105, 3678514, 5255020, 6776210, 7357028, 9196285, 12874799, 13552420, 18392570, 25749598, 36785140, 51499196, 64373995, 128747990, 257495980]

約数ペア:

[(1, 257495980), (2, 128747990), (4, 64373995), (5, 51499196), (7, 36785140), (10, 25749598), (14, 18392570), (19, 13552420), (20, 12874799), (28, 9196285), (35, 7357028), (38, 6776210), (49, 5255020), (70, 3678514), (76, 3388105), (95, 2710484), (98, 2627510), (133, 1936060), (140, 1839257), (190, 1355242), (196, 1313755), (245, 1051004), (266, 968030), (380, 677621), (490, 525502), (532, 484015), (665, 387212), (931, 276580), (980, 262751), (1330, 193606), (1862, 138290), (2660, 96803), (3724, 69145), (4655, 55316), (9310, 27658), (13829, 18620)]