81005000

素因数分解:

$2^3\times 5^4\times {\mathrm{17}}^1\times {\mathrm{953}}^1$

素因数の和:996

約数の個数: 80

約数和(自身を含む): 201169980

約数和(自身を除く): 120164980

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 25, 34, 40, 50, 68, 85, 100, 125, 136, 170, 200, 250, 340, 425, 500, 625, 680, 850, 953, 1000, 1250, 1700, 1906, 2125, 2500, 3400, 3812, 4250, 4765, 5000, 7624, 8500, 9530, 10625, 16201, 17000, 19060, 21250, 23825, 32402, 38120, 42500, 47650, 64804, 81005, 85000, 95300, 119125, 129608, 162010, 190600, 238250, 324020, 405025, 476500, 595625, 648040, 810050, 953000, 1191250, 1620100, 2025125, 2382500, 3240200, 4050250, 4765000, 8100500, 10125625, 16201000, 20251250, 40502500, 81005000]

約数ペア:

[(1, 81005000), (2, 40502500), (4, 20251250), (5, 16201000), (8, 10125625), (10, 8100500), (17, 4765000), (20, 4050250), (25, 3240200), (34, 2382500), (40, 2025125), (50, 1620100), (68, 1191250), (85, 953000), (100, 810050), (125, 648040), (136, 595625), (170, 476500), (200, 405025), (250, 324020), (340, 238250), (425, 190600), (500, 162010), (625, 129608), (680, 119125), (850, 95300), (953, 85000), (1000, 81005), (1250, 64804), (1700, 47650), (1906, 42500), (2125, 38120), (2500, 32402), (3400, 23825), (3812, 21250), (4250, 19060), (4765, 17000), (5000, 16201), (7624, 10625), (8500, 9530)]