81640000

素因数分解:

$2^6\times 5^4\times {\mathrm{13}}^1\times {\mathrm{157}}^1$

素因数の和:202

約数の個数: 140

約数和(自身を含む): 219401644

約数和(自身を除く): 137761644

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 32, 40, 50, 52, 64, 65, 80, 100, 104, 125, 130, 157, 160, 200, 208, 250, 260, 314, 320, 325, 400, 416, 500, 520, 625, 628, 650, 785, 800, 832, 1000, 1040, 1250, 1256, 1300, 1570, 1600, 1625, 2000, 2041, 2080, 2500, 2512, 2600, 3140, 3250, 3925, 4000, 4082, 4160, 5000, 5024, 5200, 6280, 6500, 7850, 8000, 8125, 8164, 10000, 10048, 10205, 10400, 12560, 13000, 15700, 16250, 16328, 19625, 20000, 20410, 20800, 25120, 26000, 31400, 32500, 32656, 39250, 40000, 40820, 50240, 51025, 52000, 62800, 65000, 65312, 78500, 81640, 98125, 102050, 104000, 125600, 130000, 130624, 157000, 163280, 196250, 204100, 251200, 255125, 260000, 314000, 326560, 392500, 408200, 510250, 520000, 628000, 653120, 785000, 816400, 1020500, 1256000, 1275625, 1570000, 1632800, 2041000, 2551250, 3140000, 3265600, 4082000, 5102500, 6280000, 8164000, 10205000, 16328000, 20410000, 40820000, 81640000]

約数ペア:

[(1, 81640000), (2, 40820000), (4, 20410000), (5, 16328000), (8, 10205000), (10, 8164000), (13, 6280000), (16, 5102500), (20, 4082000), (25, 3265600), (26, 3140000), (32, 2551250), (40, 2041000), (50, 1632800), (52, 1570000), (64, 1275625), (65, 1256000), (80, 1020500), (100, 816400), (104, 785000), (125, 653120), (130, 628000), (157, 520000), (160, 510250), (200, 408200), (208, 392500), (250, 326560), (260, 314000), (314, 260000), (320, 255125), (325, 251200), (400, 204100), (416, 196250), (500, 163280), (520, 157000), (625, 130624), (628, 130000), (650, 125600), (785, 104000), (800, 102050), (832, 98125), (1000, 81640), (1040, 78500), (1250, 65312), (1256, 65000), (1300, 62800), (1570, 52000), (1600, 51025), (1625, 50240), (2000, 40820), (2041, 40000), (2080, 39250), (2500, 32656), (2512, 32500), (2600, 31400), (3140, 26000), (3250, 25120), (3925, 20800), (4000, 20410), (4082, 20000), (4160, 19625), (5000, 16328), (5024, 16250), (5200, 15700), (6280, 13000), (6500, 12560), (7850, 10400), (8000, 10205), (8125, 10048), (8164, 10000)]