21215142

素因数分解:

$2^1\times 3^3\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{643}}^1$

素因数の和:714

約数の個数: 64

約数和(自身を含む): 51932160

約数和(自身を除く): 30717018

約数列:

[1, 2, 3, 6, 9, 13, 18, 26, 27, 39, 47, 54, 78, 94, 117, 141, 234, 282, 351, 423, 611, 643, 702, 846, 1222, 1269, 1286, 1833, 1929, 2538, 3666, 3858, 5499, 5787, 8359, 10998, 11574, 16497, 16718, 17361, 25077, 30221, 32994, 34722, 50154, 60442, 75231, 90663, 150462, 181326, 225693, 271989, 392873, 451386, 543978, 785746, 815967, 1178619, 1631934, 2357238, 3535857, 7071714, 10607571, 21215142]

約数ペア:

[(1, 21215142), (2, 10607571), (3, 7071714), (6, 3535857), (9, 2357238), (13, 1631934), (18, 1178619), (26, 815967), (27, 785746), (39, 543978), (47, 451386), (54, 392873), (78, 271989), (94, 225693), (117, 181326), (141, 150462), (234, 90663), (282, 75231), (351, 60442), (423, 50154), (611, 34722), (643, 32994), (702, 30221), (846, 25077), (1222, 17361), (1269, 16718), (1286, 16497), (1833, 11574), (1929, 10998), (2538, 8359), (3666, 5787), (3858, 5499)]