28779140

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{1559}}^1$

素因数の和:1652

約数の個数: 48

約数和(自身を含む): 66044160

約数和(自身を除く): 37265020

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 71, 130, 142, 260, 284, 355, 710, 923, 1420, 1559, 1846, 3118, 3692, 4615, 6236, 7795, 9230, 15590, 18460, 20267, 31180, 40534, 81068, 101335, 110689, 202670, 221378, 405340, 442756, 553445, 1106890, 1438957, 2213780, 2877914, 5755828, 7194785, 14389570, 28779140]

約数ペア:

[(1, 28779140), (2, 14389570), (4, 7194785), (5, 5755828), (10, 2877914), (13, 2213780), (20, 1438957), (26, 1106890), (52, 553445), (65, 442756), (71, 405340), (130, 221378), (142, 202670), (260, 110689), (284, 101335), (355, 81068), (710, 40534), (923, 31180), (1420, 20267), (1559, 18460), (1846, 15590), (3118, 9230), (3692, 7795), (4615, 6236)]