680496280

素因数分解:

$2^3\times 5^1\times {\mathrm{103}}^1\times {\mathrm{331}}^1\times {\mathrm{499}}^1$

素因数の和:944

約数の個数: 64

約数和(自身を含む): 1553760000

約数和(自身を除く): 873263720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 103, 206, 331, 412, 499, 515, 662, 824, 998, 1030, 1324, 1655, 1996, 2060, 2495, 2648, 3310, 3992, 4120, 4990, 6620, 9980, 13240, 19960, 34093, 51397, 68186, 102794, 136372, 165169, 170465, 205588, 256985, 272744, 330338, 340930, 411176, 513970, 660676, 681860, 825845, 1027940, 1321352, 1363720, 1651690, 2055880, 3303380, 6606760, 17012407, 34024814, 68049628, 85062035, 136099256, 170124070, 340248140, 680496280]

約数ペア:

[(1, 680496280), (2, 340248140), (4, 170124070), (5, 136099256), (8, 85062035), (10, 68049628), (20, 34024814), (40, 17012407), (103, 6606760), (206, 3303380), (331, 2055880), (412, 1651690), (499, 1363720), (515, 1321352), (662, 1027940), (824, 825845), (998, 681860), (1030, 660676), (1324, 513970), (1655, 411176), (1996, 340930), (2060, 330338), (2495, 272744), (2648, 256985), (3310, 205588), (3992, 170465), (4120, 165169), (4990, 136372), (6620, 102794), (9980, 68186), (13240, 51397), (19960, 34093)]