256020

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{251}}^1$

素因数の和:280

約数の個数: 48

約数和(自身を含む): 762048

約数和(自身を除く): 506028

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 17, 20, 30, 34, 51, 60, 68, 85, 102, 170, 204, 251, 255, 340, 502, 510, 753, 1004, 1020, 1255, 1506, 2510, 3012, 3765, 4267, 5020, 7530, 8534, 12801, 15060, 17068, 21335, 25602, 42670, 51204, 64005, 85340, 128010, 256020]

約数ペア:

[(1, 256020), (2, 128010), (3, 85340), (4, 64005), (5, 51204), (6, 42670), (10, 25602), (12, 21335), (15, 17068), (17, 15060), (20, 12801), (30, 8534), (34, 7530), (51, 5020), (60, 4267), (68, 3765), (85, 3012), (102, 2510), (170, 1506), (204, 1255), (251, 1020), (255, 1004), (340, 753), (502, 510)]