20008000

素因数分解:

$2^6\times 5^3\times {\mathrm{41}}^1\times {\mathrm{61}}^1$

素因数の和:129

約数の個数: 112

約数和(自身を含む): 51590448

約数和(自身を除く): 31582448

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 41, 50, 61, 64, 80, 82, 100, 122, 125, 160, 164, 200, 205, 244, 250, 305, 320, 328, 400, 410, 488, 500, 610, 656, 800, 820, 976, 1000, 1025, 1220, 1312, 1525, 1600, 1640, 1952, 2000, 2050, 2440, 2501, 2624, 3050, 3280, 3904, 4000, 4100, 4880, 5002, 5125, 6100, 6560, 7625, 8000, 8200, 9760, 10004, 10250, 12200, 12505, 13120, 15250, 16400, 19520, 20008, 20500, 24400, 25010, 30500, 32800, 40016, 41000, 48800, 50020, 61000, 62525, 65600, 80032, 82000, 97600, 100040, 122000, 125050, 160064, 164000, 200080, 244000, 250100, 312625, 328000, 400160, 488000, 500200, 625250, 800320, 1000400, 1250500, 2000800, 2501000, 4001600, 5002000, 10004000, 20008000]

約数ペア:

[(1, 20008000), (2, 10004000), (4, 5002000), (5, 4001600), (8, 2501000), (10, 2000800), (16, 1250500), (20, 1000400), (25, 800320), (32, 625250), (40, 500200), (41, 488000), (50, 400160), (61, 328000), (64, 312625), (80, 250100), (82, 244000), (100, 200080), (122, 164000), (125, 160064), (160, 125050), (164, 122000), (200, 100040), (205, 97600), (244, 82000), (250, 80032), (305, 65600), (320, 62525), (328, 61000), (400, 50020), (410, 48800), (488, 41000), (500, 40016), (610, 32800), (656, 30500), (800, 25010), (820, 24400), (976, 20500), (1000, 20008), (1025, 19520), (1220, 16400), (1312, 15250), (1525, 13120), (1600, 12505), (1640, 12200), (1952, 10250), (2000, 10004), (2050, 9760), (2440, 8200), (2501, 8000), (2624, 7625), (3050, 6560), (3280, 6100), (3904, 5125), (4000, 5002), (4100, 4880)]