21701900

素因数分解:

$2^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{109}}^1\times {\mathrm{181}}^1$

素因数の和:315

約数の個数: 72

約数和(自身を含む): 52132080

約数和(自身を除く): 30430180

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 25, 44, 50, 55, 100, 109, 110, 181, 218, 220, 275, 362, 436, 545, 550, 724, 905, 1090, 1100, 1199, 1810, 1991, 2180, 2398, 2725, 3620, 3982, 4525, 4796, 5450, 5995, 7964, 9050, 9955, 10900, 11990, 18100, 19729, 19910, 23980, 29975, 39458, 39820, 49775, 59950, 78916, 98645, 99550, 119900, 197290, 199100, 217019, 394580, 434038, 493225, 868076, 986450, 1085095, 1972900, 2170190, 4340380, 5425475, 10850950, 21701900]

約数ペア:

[(1, 21701900), (2, 10850950), (4, 5425475), (5, 4340380), (10, 2170190), (11, 1972900), (20, 1085095), (22, 986450), (25, 868076), (44, 493225), (50, 434038), (55, 394580), (100, 217019), (109, 199100), (110, 197290), (181, 119900), (218, 99550), (220, 98645), (275, 78916), (362, 59950), (436, 49775), (545, 39820), (550, 39458), (724, 29975), (905, 23980), (1090, 19910), (1100, 19729), (1199, 18100), (1810, 11990), (1991, 10900), (2180, 9955), (2398, 9050), (2725, 7964), (3620, 5995), (3982, 5450), (4525, 4796)]