20915720

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{74699}}^1$

素因数の和:74717

約数の個数: 32

約数和(自身を含む): 53784000

約数和(自身を除く): 32868280

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 74699, 149398, 298796, 373495, 522893, 597592, 746990, 1045786, 1493980, 2091572, 2614465, 2987960, 4183144, 5228930, 10457860, 20915720]

約数ペア:

[(1, 20915720), (2, 10457860), (4, 5228930), (5, 4183144), (7, 2987960), (8, 2614465), (10, 2091572), (14, 1493980), (20, 1045786), (28, 746990), (35, 597592), (40, 522893), (56, 373495), (70, 298796), (140, 149398), (280, 74699)]