247940

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1$

素因数の和:57

約数の個数: 72

約数和(自身を含む): 689472

約数和(自身を除く): 441532

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 23, 28, 35, 44, 46, 49, 55, 70, 77, 92, 98, 110, 115, 140, 154, 161, 196, 220, 230, 245, 253, 308, 322, 385, 460, 490, 506, 539, 644, 770, 805, 980, 1012, 1078, 1127, 1265, 1540, 1610, 1771, 2156, 2254, 2530, 2695, 3220, 3542, 4508, 5060, 5390, 5635, 7084, 8855, 10780, 11270, 12397, 17710, 22540, 24794, 35420, 49588, 61985, 123970, 247940]

約数ペア:

[(1, 247940), (2, 123970), (4, 61985), (5, 49588), (7, 35420), (10, 24794), (11, 22540), (14, 17710), (20, 12397), (22, 11270), (23, 10780), (28, 8855), (35, 7084), (44, 5635), (46, 5390), (49, 5060), (55, 4508), (70, 3542), (77, 3220), (92, 2695), (98, 2530), (110, 2254), (115, 2156), (140, 1771), (154, 1610), (161, 1540), (196, 1265), (220, 1127), (230, 1078), (245, 1012), (253, 980), (308, 805), (322, 770), (385, 644), (460, 539), (490, 506)]