245980

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{251}}^1$

素因数の和:274

約数の個数: 36

約数和(自身を含む): 603288

約数和(自身を除く): 357308

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 251, 490, 502, 980, 1004, 1255, 1757, 2510, 3514, 5020, 7028, 8785, 12299, 17570, 24598, 35140, 49196, 61495, 122990, 245980]

約数ペア:

[(1, 245980), (2, 122990), (4, 61495), (5, 49196), (7, 35140), (10, 24598), (14, 17570), (20, 12299), (28, 8785), (35, 7028), (49, 5020), (70, 3514), (98, 2510), (140, 1757), (196, 1255), (245, 1004), (251, 980), (490, 502)]