1989012080

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{72911}}^1$

素因数の和:72966

約数の個数: 80

約数和(自身を含む): 5207666688

約数和(自身を除く): 3218654608

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 31, 40, 44, 55, 62, 80, 88, 110, 124, 155, 176, 220, 248, 310, 341, 440, 496, 620, 682, 880, 1240, 1364, 1705, 2480, 2728, 3410, 5456, 6820, 13640, 27280, 72911, 145822, 291644, 364555, 583288, 729110, 802021, 1166576, 1458220, 1604042, 2260241, 2916440, 3208084, 4010105, 4520482, 5832880, 6416168, 8020210, 9040964, 11301205, 12832336, 16040420, 18081928, 22602410, 24862651, 32080840, 36163856, 45204820, 49725302, 64161680, 90409640, 99450604, 124313255, 180819280, 198901208, 248626510, 397802416, 497253020, 994506040, 1989012080]

約数ペア:

[(1, 1989012080), (2, 994506040), (4, 497253020), (5, 397802416), (8, 248626510), (10, 198901208), (11, 180819280), (16, 124313255), (20, 99450604), (22, 90409640), (31, 64161680), (40, 49725302), (44, 45204820), (55, 36163856), (62, 32080840), (80, 24862651), (88, 22602410), (110, 18081928), (124, 16040420), (155, 12832336), (176, 11301205), (220, 9040964), (248, 8020210), (310, 6416168), (341, 5832880), (440, 4520482), (496, 4010105), (620, 3208084), (682, 2916440), (880, 2260241), (1240, 1604042), (1364, 1458220), (1705, 1166576), (2480, 802021), (2728, 729110), (3410, 583288), (5456, 364555), (6820, 291644), (13640, 145822), (27280, 72911)]