20280220

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{83}}^1\times {\mathrm{643}}^1$

素因数の和:754

約数の個数: 48

約数和(自身を含む): 45440640

約数和(自身を除く): 25160420

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 83, 95, 166, 190, 332, 380, 415, 643, 830, 1286, 1577, 1660, 2572, 3154, 3215, 6308, 6430, 7885, 12217, 12860, 15770, 24434, 31540, 48868, 53369, 61085, 106738, 122170, 213476, 244340, 266845, 533690, 1014011, 1067380, 2028022, 4056044, 5070055, 10140110, 20280220]

約数ペア:

[(1, 20280220), (2, 10140110), (4, 5070055), (5, 4056044), (10, 2028022), (19, 1067380), (20, 1014011), (38, 533690), (76, 266845), (83, 244340), (95, 213476), (166, 122170), (190, 106738), (332, 61085), (380, 53369), (415, 48868), (643, 31540), (830, 24434), (1286, 15770), (1577, 12860), (1660, 12217), (2572, 7885), (3154, 6430), (3215, 6308)]