20671508

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{509}}^1$

素因数の和:608

約数の個数: 48

約数和(自身を含む): 43182720

約数和(自身を除く): 22511212

約数列:

[1, 2, 4, 11, 13, 22, 26, 44, 52, 71, 142, 143, 284, 286, 509, 572, 781, 923, 1018, 1562, 1846, 2036, 3124, 3692, 5599, 6617, 10153, 11198, 13234, 20306, 22396, 26468, 36139, 40612, 72278, 72787, 144556, 145574, 291148, 397529, 469807, 795058, 939614, 1590116, 1879228, 5167877, 10335754, 20671508]

約数ペア:

[(1, 20671508), (2, 10335754), (4, 5167877), (11, 1879228), (13, 1590116), (22, 939614), (26, 795058), (44, 469807), (52, 397529), (71, 291148), (142, 145574), (143, 144556), (284, 72787), (286, 72278), (509, 40612), (572, 36139), (781, 26468), (923, 22396), (1018, 20306), (1562, 13234), (1846, 11198), (2036, 10153), (3124, 6617), (3692, 5599)]