21097450

素因数分解:

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

素因数の和:543

約数の個数: 48

約数和(自身を含む): 43390080

約数和(自身を除く): 22292630

約数列:

[1, 2, 5, 10, 11, 22, 25, 50, 55, 89, 110, 178, 275, 431, 445, 550, 862, 890, 979, 1958, 2155, 2225, 4310, 4450, 4741, 4895, 9482, 9790, 10775, 21550, 23705, 24475, 38359, 47410, 48950, 76718, 118525, 191795, 237050, 383590, 421949, 843898, 958975, 1917950, 2109745, 4219490, 10548725, 21097450]

約数ペア:

[(1, 21097450), (2, 10548725), (5, 4219490), (10, 2109745), (11, 1917950), (22, 958975), (25, 843898), (50, 421949), (55, 383590), (89, 237050), (110, 191795), (178, 118525), (275, 76718), (431, 48950), (445, 47410), (550, 38359), (862, 24475), (890, 23705), (979, 21550), (1958, 10775), (2155, 9790), (2225, 9482), (4310, 4895), (4450, 4741)]