721000220

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{443}}^1\times {\mathrm{4283}}^1$

素因数の和:4754

約数の個数: 48

約数和(自身を含む): 1597760640

約数和(自身を除く): 876760420

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 443, 886, 1772, 2215, 4283, 4430, 8417, 8566, 8860, 16834, 17132, 21415, 33668, 42085, 42830, 81377, 84170, 85660, 162754, 168340, 325508, 406885, 813770, 1627540, 1897369, 3794738, 7589476, 9486845, 18973690, 36050011, 37947380, 72100022, 144200044, 180250055, 360500110, 721000220]

約数ペア:

[(1, 721000220), (2, 360500110), (4, 180250055), (5, 144200044), (10, 72100022), (19, 37947380), (20, 36050011), (38, 18973690), (76, 9486845), (95, 7589476), (190, 3794738), (380, 1897369), (443, 1627540), (886, 813770), (1772, 406885), (2215, 325508), (4283, 168340), (4430, 162754), (8417, 85660), (8566, 84170), (8860, 81377), (16834, 42830), (17132, 42085), (21415, 33668)]