12505000

素因数分解:

$2^3\times 5^4\times {\mathrm{41}}^1\times {\mathrm{61}}^1$

素因数の和:128

約数の個数: 80

約数和(自身を含む): 30505860

約数和(自身を除く): 18000860

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 41, 50, 61, 82, 100, 122, 125, 164, 200, 205, 244, 250, 305, 328, 410, 488, 500, 610, 625, 820, 1000, 1025, 1220, 1250, 1525, 1640, 2050, 2440, 2500, 2501, 3050, 4100, 5000, 5002, 5125, 6100, 7625, 8200, 10004, 10250, 12200, 12505, 15250, 20008, 20500, 25010, 25625, 30500, 38125, 41000, 50020, 51250, 61000, 62525, 76250, 100040, 102500, 125050, 152500, 205000, 250100, 305000, 312625, 500200, 625250, 1250500, 1563125, 2501000, 3126250, 6252500, 12505000]

約数ペア:

[(1, 12505000), (2, 6252500), (4, 3126250), (5, 2501000), (8, 1563125), (10, 1250500), (20, 625250), (25, 500200), (40, 312625), (41, 305000), (50, 250100), (61, 205000), (82, 152500), (100, 125050), (122, 102500), (125, 100040), (164, 76250), (200, 62525), (205, 61000), (244, 51250), (250, 50020), (305, 41000), (328, 38125), (410, 30500), (488, 25625), (500, 25010), (610, 20500), (625, 20008), (820, 15250), (1000, 12505), (1025, 12200), (1220, 10250), (1250, 10004), (1525, 8200), (1640, 7625), (2050, 6100), (2440, 5125), (2500, 5002), (2501, 5000), (3050, 4100)]