8438980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{431}}^1$

素因数の和:540

約数の個数: 48

約数和(自身を含む): 19595520

約数和(自身を除く): 11156540

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 89, 110, 178, 220, 356, 431, 445, 862, 890, 979, 1724, 1780, 1958, 2155, 3916, 4310, 4741, 4895, 8620, 9482, 9790, 18964, 19580, 23705, 38359, 47410, 76718, 94820, 153436, 191795, 383590, 421949, 767180, 843898, 1687796, 2109745, 4219490, 8438980]

約数ペア:

[(1, 8438980), (2, 4219490), (4, 2109745), (5, 1687796), (10, 843898), (11, 767180), (20, 421949), (22, 383590), (44, 191795), (55, 153436), (89, 94820), (110, 76718), (178, 47410), (220, 38359), (356, 23705), (431, 19580), (445, 18964), (862, 9790), (890, 9482), (979, 8620), (1724, 4895), (1780, 4741), (1958, 4310), (2155, 3916)]