209515900

素因数分解:

$2^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{79}}^1\times {\mathrm{2411}}^1$

素因数の和:2515

約数の個数: 72

約数和(自身を含む): 502467840

約数和(自身を除く): 292951940

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 25, 44, 50, 55, 79, 100, 110, 158, 220, 275, 316, 395, 550, 790, 869, 1100, 1580, 1738, 1975, 2411, 3476, 3950, 4345, 4822, 7900, 8690, 9644, 12055, 17380, 21725, 24110, 26521, 43450, 48220, 53042, 60275, 86900, 106084, 120550, 132605, 190469, 241100, 265210, 380938, 530420, 663025, 761876, 952345, 1326050, 1904690, 2095159, 2652100, 3809380, 4190318, 4761725, 8380636, 9523450, 10475795, 19046900, 20951590, 41903180, 52378975, 104757950, 209515900]

約数ペア:

[(1, 209515900), (2, 104757950), (4, 52378975), (5, 41903180), (10, 20951590), (11, 19046900), (20, 10475795), (22, 9523450), (25, 8380636), (44, 4761725), (50, 4190318), (55, 3809380), (79, 2652100), (100, 2095159), (110, 1904690), (158, 1326050), (220, 952345), (275, 761876), (316, 663025), (395, 530420), (550, 380938), (790, 265210), (869, 241100), (1100, 190469), (1580, 132605), (1738, 120550), (1975, 106084), (2411, 86900), (3476, 60275), (3950, 53042), (4345, 48220), (4822, 43450), (7900, 26521), (8690, 24110), (9644, 21725), (12055, 17380)]