128983280

素因数分解:

$2^4\times 5^1\times {\mathrm{61}}^1\times {\mathrm{26431}}^1$

素因数の和:26505

約数の個数: 40

約数和(自身を含む): 304813824

約数和(自身を除く): 175830544

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 61, 80, 122, 244, 305, 488, 610, 976, 1220, 2440, 4880, 26431, 52862, 105724, 132155, 211448, 264310, 422896, 528620, 1057240, 1612291, 2114480, 3224582, 6449164, 8061455, 12898328, 16122910, 25796656, 32245820, 64491640, 128983280]

約数ペア:

[(1, 128983280), (2, 64491640), (4, 32245820), (5, 25796656), (8, 16122910), (10, 12898328), (16, 8061455), (20, 6449164), (40, 3224582), (61, 2114480), (80, 1612291), (122, 1057240), (244, 528620), (305, 422896), (488, 264310), (610, 211448), (976, 132155), (1220, 105724), (2440, 52862), (4880, 26431)]