81114280

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{389}}^1\times {\mathrm{401}}^1$

素因数の和:814

約数の個数: 64

約数和(自身を含む): 197542800

約数和(自身を除く): 116428520

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 389, 401, 520, 778, 802, 1556, 1604, 1945, 2005, 3112, 3208, 3890, 4010, 5057, 5213, 7780, 8020, 10114, 10426, 15560, 16040, 20228, 20852, 25285, 26065, 40456, 41704, 50570, 52130, 101140, 104260, 155989, 202280, 208520, 311978, 623956, 779945, 1247912, 1559890, 2027857, 3119780, 4055714, 6239560, 8111428, 10139285, 16222856, 20278570, 40557140, 81114280]

約数ペア:

[(1, 81114280), (2, 40557140), (4, 20278570), (5, 16222856), (8, 10139285), (10, 8111428), (13, 6239560), (20, 4055714), (26, 3119780), (40, 2027857), (52, 1559890), (65, 1247912), (104, 779945), (130, 623956), (260, 311978), (389, 208520), (401, 202280), (520, 155989), (778, 104260), (802, 101140), (1556, 52130), (1604, 50570), (1945, 41704), (2005, 40456), (3112, 26065), (3208, 25285), (3890, 20852), (4010, 20228), (5057, 16040), (5213, 15560), (7780, 10426), (8020, 10114)]