86900000

素因数分解:

$2^5\times 5^5\times {\mathrm{11}}^1\times {\mathrm{79}}^1$

素因数の和:125

約数の個数: 144

約数和(自身を含む): 236234880

約数和(自身を除く): 149334880

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 25, 32, 40, 44, 50, 55, 79, 80, 88, 100, 110, 125, 158, 160, 176, 200, 220, 250, 275, 316, 352, 395, 400, 440, 500, 550, 625, 632, 790, 800, 869, 880, 1000, 1100, 1250, 1264, 1375, 1580, 1738, 1760, 1975, 2000, 2200, 2500, 2528, 2750, 3125, 3160, 3476, 3950, 4000, 4345, 4400, 5000, 5500, 6250, 6320, 6875, 6952, 7900, 8690, 8800, 9875, 10000, 11000, 12500, 12640, 13750, 13904, 15800, 17380, 19750, 20000, 21725, 22000, 25000, 27500, 27808, 31600, 34375, 34760, 39500, 43450, 44000, 49375, 50000, 55000, 63200, 68750, 69520, 79000, 86900, 98750, 100000, 108625, 110000, 137500, 139040, 158000, 173800, 197500, 217250, 220000, 246875, 275000, 316000, 347600, 395000, 434500, 493750, 543125, 550000, 695200, 790000, 869000, 987500, 1086250, 1100000, 1580000, 1738000, 1975000, 2172500, 2715625, 3476000, 3950000, 4345000, 5431250, 7900000, 8690000, 10862500, 17380000, 21725000, 43450000, 86900000]

約数ペア:

[(1, 86900000), (2, 43450000), (4, 21725000), (5, 17380000), (8, 10862500), (10, 8690000), (11, 7900000), (16, 5431250), (20, 4345000), (22, 3950000), (25, 3476000), (32, 2715625), (40, 2172500), (44, 1975000), (50, 1738000), (55, 1580000), (79, 1100000), (80, 1086250), (88, 987500), (100, 869000), (110, 790000), (125, 695200), (158, 550000), (160, 543125), (176, 493750), (200, 434500), (220, 395000), (250, 347600), (275, 316000), (316, 275000), (352, 246875), (395, 220000), (400, 217250), (440, 197500), (500, 173800), (550, 158000), (625, 139040), (632, 137500), (790, 110000), (800, 108625), (869, 100000), (880, 98750), (1000, 86900), (1100, 79000), (1250, 69520), (1264, 68750), (1375, 63200), (1580, 55000), (1738, 50000), (1760, 49375), (1975, 44000), (2000, 43450), (2200, 39500), (2500, 34760), (2528, 34375), (2750, 31600), (3125, 27808), (3160, 27500), (3476, 25000), (3950, 22000), (4000, 21725), (4345, 20000), (4400, 19750), (5000, 17380), (5500, 15800), (6250, 13904), (6320, 13750), (6875, 12640), (6952, 12500), (7900, 11000), (8690, 10000), (8800, 9875)]