20328490

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{251}}^1$

素因数の和:367

約数の個数: 64

約数和(自身を含む): 45722880

約数和(自身を除く): 25394390

約数列:

[1, 2, 5, 7, 10, 13, 14, 26, 35, 65, 70, 89, 91, 130, 178, 182, 251, 445, 455, 502, 623, 890, 910, 1157, 1246, 1255, 1757, 2314, 2510, 3115, 3263, 3514, 5785, 6230, 6526, 8099, 8785, 11570, 16198, 16315, 17570, 22339, 22841, 32630, 40495, 44678, 45682, 80990, 111695, 114205, 156373, 223390, 228410, 290407, 312746, 580814, 781865, 1452035, 1563730, 2032849, 2904070, 4065698, 10164245, 20328490]

約数ペア:

[(1, 20328490), (2, 10164245), (5, 4065698), (7, 2904070), (10, 2032849), (13, 1563730), (14, 1452035), (26, 781865), (35, 580814), (65, 312746), (70, 290407), (89, 228410), (91, 223390), (130, 156373), (178, 114205), (182, 111695), (251, 80990), (445, 45682), (455, 44678), (502, 40495), (623, 32630), (890, 22841), (910, 22339), (1157, 17570), (1246, 16315), (1255, 16198), (1757, 11570), (2314, 8785), (2510, 8099), (3115, 6526), (3263, 6230), (3514, 5785)]