638164180

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{157}}^1\times {\mathrm{4957}}^1$

素因数の和:5164

約数の個数: 48

約数和(自身を含む): 1381854096

約数和(自身を除く): 743689916

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 157, 164, 205, 314, 410, 628, 785, 820, 1570, 3140, 4957, 6437, 9914, 12874, 19828, 24785, 25748, 32185, 49570, 64370, 99140, 128740, 203237, 406474, 778249, 812948, 1016185, 1556498, 2032370, 3112996, 3891245, 4064740, 7782490, 15564980, 31908209, 63816418, 127632836, 159541045, 319082090, 638164180]

約数ペア:

[(1, 638164180), (2, 319082090), (4, 159541045), (5, 127632836), (10, 63816418), (20, 31908209), (41, 15564980), (82, 7782490), (157, 4064740), (164, 3891245), (205, 3112996), (314, 2032370), (410, 1556498), (628, 1016185), (785, 812948), (820, 778249), (1570, 406474), (3140, 203237), (4957, 128740), (6437, 99140), (9914, 64370), (12874, 49570), (19828, 32185), (24785, 25748)]