20045000

素因数分解:

$2^3\times 5^4\times {\mathrm{19}}^1\times {\mathrm{211}}^1$

素因数の和:256

約数の個数: 80

約数和(自身を含む): 49671600

約数和(自身を除く): 29626600

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 25, 38, 40, 50, 76, 95, 100, 125, 152, 190, 200, 211, 250, 380, 422, 475, 500, 625, 760, 844, 950, 1000, 1055, 1250, 1688, 1900, 2110, 2375, 2500, 3800, 4009, 4220, 4750, 5000, 5275, 8018, 8440, 9500, 10550, 11875, 16036, 19000, 20045, 21100, 23750, 26375, 32072, 40090, 42200, 47500, 52750, 80180, 95000, 100225, 105500, 131875, 160360, 200450, 211000, 263750, 400900, 501125, 527500, 801800, 1002250, 1055000, 2004500, 2505625, 4009000, 5011250, 10022500, 20045000]

約数ペア:

[(1, 20045000), (2, 10022500), (4, 5011250), (5, 4009000), (8, 2505625), (10, 2004500), (19, 1055000), (20, 1002250), (25, 801800), (38, 527500), (40, 501125), (50, 400900), (76, 263750), (95, 211000), (100, 200450), (125, 160360), (152, 131875), (190, 105500), (200, 100225), (211, 95000), (250, 80180), (380, 52750), (422, 47500), (475, 42200), (500, 40090), (625, 32072), (760, 26375), (844, 23750), (950, 21100), (1000, 20045), (1055, 19000), (1250, 16036), (1688, 11875), (1900, 10550), (2110, 9500), (2375, 8440), (2500, 8018), (3800, 5275), (4009, 5000), (4220, 4750)]