20726888

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{401}}^1$

素因数の和:498

約数の個数: 64

約数和(自身を含む): 48625920

約数和(自身を除く): 27899032

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 52, 56, 71, 91, 104, 142, 182, 284, 364, 401, 497, 568, 728, 802, 923, 994, 1604, 1846, 1988, 2807, 3208, 3692, 3976, 5213, 5614, 6461, 7384, 10426, 11228, 12922, 20852, 22456, 25844, 28471, 36491, 41704, 51688, 56942, 72982, 113884, 145964, 199297, 227768, 291928, 370123, 398594, 740246, 797188, 1480492, 1594376, 2590861, 2960984, 5181722, 10363444, 20726888]

約数ペア:

[(1, 20726888), (2, 10363444), (4, 5181722), (7, 2960984), (8, 2590861), (13, 1594376), (14, 1480492), (26, 797188), (28, 740246), (52, 398594), (56, 370123), (71, 291928), (91, 227768), (104, 199297), (142, 145964), (182, 113884), (284, 72982), (364, 56942), (401, 51688), (497, 41704), (568, 36491), (728, 28471), (802, 25844), (923, 22456), (994, 20852), (1604, 12922), (1846, 11228), (1988, 10426), (2807, 7384), (3208, 6461), (3692, 5614), (3976, 5213)]