18698900

素因数分解:

$2^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{191}}^1$

素因数の和:305

約数の個数: 72

約数和(自身を含む): 44997120

約数和(自身を除く): 26298220

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 25, 44, 50, 55, 89, 100, 110, 178, 191, 220, 275, 356, 382, 445, 550, 764, 890, 955, 979, 1100, 1780, 1910, 1958, 2101, 2225, 3820, 3916, 4202, 4450, 4775, 4895, 8404, 8900, 9550, 9790, 10505, 16999, 19100, 19580, 21010, 24475, 33998, 42020, 48950, 52525, 67996, 84995, 97900, 105050, 169990, 186989, 210100, 339980, 373978, 424975, 747956, 849950, 934945, 1699900, 1869890, 3739780, 4674725, 9349450, 18698900]

約数ペア:

[(1, 18698900), (2, 9349450), (4, 4674725), (5, 3739780), (10, 1869890), (11, 1699900), (20, 934945), (22, 849950), (25, 747956), (44, 424975), (50, 373978), (55, 339980), (89, 210100), (100, 186989), (110, 169990), (178, 105050), (191, 97900), (220, 84995), (275, 67996), (356, 52525), (382, 48950), (445, 42020), (550, 33998), (764, 24475), (890, 21010), (955, 19580), (979, 19100), (1100, 16999), (1780, 10505), (1910, 9790), (1958, 9550), (2101, 8900), (2225, 8404), (3820, 4895), (3916, 4775), (4202, 4450)]