21387688

素因数分解:

$2^3\times 7^1\times {\mathrm{617}}^1\times {\mathrm{619}}^1$

素因数の和:1249

約数の個数: 32

約数和(自身を含む): 45979200

約数和(自身を除く): 24591512

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 617, 619, 1234, 1238, 2468, 2476, 4319, 4333, 4936, 4952, 8638, 8666, 17276, 17332, 34552, 34664, 381923, 763846, 1527692, 2673461, 3055384, 5346922, 10693844, 21387688]

約数ペア:

[(1, 21387688), (2, 10693844), (4, 5346922), (7, 3055384), (8, 2673461), (14, 1527692), (28, 763846), (56, 381923), (617, 34664), (619, 34552), (1234, 17332), (1238, 17276), (2468, 8666), (2476, 8638), (4319, 4952), (4333, 4936)]