28920220

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{251}}^1\times {\mathrm{823}}^1$

素因数の和:1090

約数の個数: 48

約数和(自身を含む): 69769728

約数和(自身を除く): 40849508

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 251, 502, 823, 1004, 1255, 1646, 1757, 2510, 3292, 3514, 4115, 5020, 5761, 7028, 8230, 8785, 11522, 16460, 17570, 23044, 28805, 35140, 57610, 115220, 206573, 413146, 826292, 1032865, 1446011, 2065730, 2892022, 4131460, 5784044, 7230055, 14460110, 28920220]

約数ペア:

[(1, 28920220), (2, 14460110), (4, 7230055), (5, 5784044), (7, 4131460), (10, 2892022), (14, 2065730), (20, 1446011), (28, 1032865), (35, 826292), (70, 413146), (140, 206573), (251, 115220), (502, 57610), (823, 35140), (1004, 28805), (1255, 23044), (1646, 17570), (1757, 16460), (2510, 11522), (3292, 8785), (3514, 8230), (4115, 7028), (5020, 5761)]