21000388689

素因数分解:

$3^2\times 7^3\times {\mathrm{191}}^1\times {\mathrm{35617}}^1$

素因数の和:35835

約数の個数: 48

約数和(自身を含む): 35561011200

約数和(自身を除く): 14560622511

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 191, 343, 441, 573, 1029, 1337, 1719, 3087, 4011, 9359, 12033, 28077, 35617, 65513, 84231, 106851, 196539, 249319, 320553, 589617, 747957, 1745233, 2243871, 5235699, 6802847, 12216631, 15707097, 20408541, 36649893, 47619929, 61225623, 109949679, 142859787, 333339503, 428579361, 1000018509, 2333376521, 3000055527, 7000129563, 21000388689]

約数ペア:

[(1, 21000388689), (3, 7000129563), (7, 3000055527), (9, 2333376521), (21, 1000018509), (49, 428579361), (63, 333339503), (147, 142859787), (191, 109949679), (343, 61225623), (441, 47619929), (573, 36649893), (1029, 20408541), (1337, 15707097), (1719, 12216631), (3087, 6802847), (4011, 5235699), (9359, 2243871), (12033, 1745233), (28077, 747957), (35617, 589617), (65513, 320553), (84231, 249319), (106851, 196539)]