20485000

素因数分解:

$2^3\times 5^4\times {\mathrm{17}}^1\times {\mathrm{241}}^1$

素因数の和:284

約数の個数: 80

約数和(自身を含む): 51030540

約数和(自身を除く): 30545540

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 25, 34, 40, 50, 68, 85, 100, 125, 136, 170, 200, 241, 250, 340, 425, 482, 500, 625, 680, 850, 964, 1000, 1205, 1250, 1700, 1928, 2125, 2410, 2500, 3400, 4097, 4250, 4820, 5000, 6025, 8194, 8500, 9640, 10625, 12050, 16388, 17000, 20485, 21250, 24100, 30125, 32776, 40970, 42500, 48200, 60250, 81940, 85000, 102425, 120500, 150625, 163880, 204850, 241000, 301250, 409700, 512125, 602500, 819400, 1024250, 1205000, 2048500, 2560625, 4097000, 5121250, 10242500, 20485000]

約数ペア:

[(1, 20485000), (2, 10242500), (4, 5121250), (5, 4097000), (8, 2560625), (10, 2048500), (17, 1205000), (20, 1024250), (25, 819400), (34, 602500), (40, 512125), (50, 409700), (68, 301250), (85, 241000), (100, 204850), (125, 163880), (136, 150625), (170, 120500), (200, 102425), (241, 85000), (250, 81940), (340, 60250), (425, 48200), (482, 42500), (500, 40970), (625, 32776), (680, 30125), (850, 24100), (964, 21250), (1000, 20485), (1205, 17000), (1250, 16388), (1700, 12050), (1928, 10625), (2125, 9640), (2410, 8500), (2500, 8194), (3400, 6025), (4097, 5000), (4250, 4820)]