80180000

素因数分解:

$2^5\times 5^4\times {\mathrm{19}}^1\times {\mathrm{211}}^1$

素因数の和:260

約数の個数: 120

約数和(自身を含む): 208620720

約数和(自身を除く): 128440720

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 25, 32, 38, 40, 50, 76, 80, 95, 100, 125, 152, 160, 190, 200, 211, 250, 304, 380, 400, 422, 475, 500, 608, 625, 760, 800, 844, 950, 1000, 1055, 1250, 1520, 1688, 1900, 2000, 2110, 2375, 2500, 3040, 3376, 3800, 4000, 4009, 4220, 4750, 5000, 5275, 6752, 7600, 8018, 8440, 9500, 10000, 10550, 11875, 15200, 16036, 16880, 19000, 20000, 20045, 21100, 23750, 26375, 32072, 33760, 38000, 40090, 42200, 47500, 52750, 64144, 76000, 80180, 84400, 95000, 100225, 105500, 128288, 131875, 160360, 168800, 190000, 200450, 211000, 263750, 320720, 380000, 400900, 422000, 501125, 527500, 641440, 801800, 844000, 1002250, 1055000, 1603600, 2004500, 2110000, 2505625, 3207200, 4009000, 4220000, 5011250, 8018000, 10022500, 16036000, 20045000, 40090000, 80180000]

約数ペア:

[(1, 80180000), (2, 40090000), (4, 20045000), (5, 16036000), (8, 10022500), (10, 8018000), (16, 5011250), (19, 4220000), (20, 4009000), (25, 3207200), (32, 2505625), (38, 2110000), (40, 2004500), (50, 1603600), (76, 1055000), (80, 1002250), (95, 844000), (100, 801800), (125, 641440), (152, 527500), (160, 501125), (190, 422000), (200, 400900), (211, 380000), (250, 320720), (304, 263750), (380, 211000), (400, 200450), (422, 190000), (475, 168800), (500, 160360), (608, 131875), (625, 128288), (760, 105500), (800, 100225), (844, 95000), (950, 84400), (1000, 80180), (1055, 76000), (1250, 64144), (1520, 52750), (1688, 47500), (1900, 42200), (2000, 40090), (2110, 38000), (2375, 33760), (2500, 32072), (3040, 26375), (3376, 23750), (3800, 21100), (4000, 20045), (4009, 20000), (4220, 19000), (4750, 16880), (5000, 16036), (5275, 15200), (6752, 11875), (7600, 10550), (8018, 10000), (8440, 9500)]