21248780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{6599}}^1$

素因数の和:6638

約数の個数: 48

約数和(自身を含む): 53222400

約数和(自身を除く): 31973620

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 23, 28, 35, 46, 70, 92, 115, 140, 161, 230, 322, 460, 644, 805, 1610, 3220, 6599, 13198, 26396, 32995, 46193, 65990, 92386, 131980, 151777, 184772, 230965, 303554, 461930, 607108, 758885, 923860, 1062439, 1517770, 2124878, 3035540, 4249756, 5312195, 10624390, 21248780]

約数ペア:

[(1, 21248780), (2, 10624390), (4, 5312195), (5, 4249756), (7, 3035540), (10, 2124878), (14, 1517770), (20, 1062439), (23, 923860), (28, 758885), (35, 607108), (46, 461930), (70, 303554), (92, 230965), (115, 184772), (140, 151777), (161, 131980), (230, 92386), (322, 65990), (460, 46193), (644, 32995), (805, 26396), (1610, 13198), (3220, 6599)]